Most of what you posted is already refuted by what I said prior. You either didn't understand the points I was making, or didn't read them.
Sacrificed animals, perhaps, but with animals raised for slaughter, the reclaiming is not just of "land," but also of food directly grown to feed the animals. Food that could otherwise be fed to human beings - or that could stop being grown altogether in favor of other, more human-consumption-friendly crops.
The problems with your claims:
1. Animals are often grazed on land that is not suitable for agriculture. So nothing is being taken away from food production in those cases.
2. In the vast majority of the world today, and historically, animals are never fed human edible plants like corn. It's not economically feasible to do so even if they wanted to. What happens in the USA is an inefficient abberation that doesn't represent how most of the world is growing their meat.
3. Your problem is that you talk as though this is the only way to raise meat, or even that it represents how most meat is raised. But it's not even true of the majority of beef in the US. Where the overwhelming majority of their growth is done off grass and scrubland - not corn feedlots. And those acres are very often not suitable to agriculture for a variety of reasons. You couldn't feed a cow only grains even if you wanted to. They'd die. That's why they can only handle getting fattened up for a short period before slaughter at feedlots.
Only things in the USA like poultry could said to be grown almost entirely based off grains. That's why other parts of the world can have trouble keeping poultry for eggs to supplement their diet - you often need a surplus of human edible food in order to keep them. You can feed poultry entirely off food and some yard waste if you generate enough of it, but you need a relatively large amount to support even a small number of chickens year round. So that's why large scale production has turned to grains.
So without access to eggs, eating grassfed animals ends up being an easier and more economical way to supplement your diet with what is lacking.
The only reason a human being could possibly "need" "animal based food" is if their locality is incapable of producing the completely viable alternatives to animal-based proteins like nuts and beans, and their society can't/wont' trade for such things.
There are many problems with your claim:
1. Nuts and beans don't give vitamin B12.
2. Most parts of the world don't have a plethora of nuts available for the average person's consumption. This is again another skewed perspective you have as a relatively rich westerner who can have nuts from every continent put on your plate every day, all year round, on demand. The bulk of most people's diets are grains and legumes for a reason. There isn't a lot of provision made for fruits, veggies, and nuts in most people groups around the world. For practical reasons of labor, land, ecology, and/or economics.
3. You will be malnourished of other nutrients and minerals if you don't replace the lack of animal protein in your diet with a range of veggies, fruits, nuts, and seeds. This is not a luxury most regions and people groups have the capability to do because of ecological, technological, and economic limitations. This is because the bulk of their diet tends to be grains, legumes, and/or starchy roots. That by itself doesn't give them what they need, but supplementing it with animal protein is one of the simplest way to shore up their weak nutritional areas.
4. There is no example of a long lived people group (defined as those that regularly have people living to be over 100 in relatively good health) where they don't eat at least some meat. This suggests it's not as easy as you think it is to get everything you truly need without animal protein.
Although I think raw veganism shows great promise as a path to longevity, when done right, it really depends a lot on living in the right climate or being economically well connected in order to pull off properly.
We also really don't yet have any examples of people who have gone the distance on raw veganism in order to assess whether or not it truly results in more longevity. I do know of some in their 80s or early 90s who are in great health and look relatively young for their age. But the real test will be whether or not they live to be around 100 or older. They also only switched to raw veganism later in life, past the age of 30. So we do have to question if that distorts the results. Because the early formative years are where a lot of nutritional deficiencies can manifest themselves strongly in debilitating conditions. Whereas adults can brush it off easier.
If we all worked together, then localities that could produce the protein-heavy items like nuts and beans could trade to those
who produce carbohydrate-heavy crops like potatoes and rice. And those who produce things like nutritional yeast and other bacteria-based yields could kick their production into overdrive, and expand their businesses for the production of those hard-to-get nutrients like B12.
There are many faults with your claim which are based in ignorance of the realities on the ground.
1. Not all ecologies can grow the variety of different plants needed.
2. If they can, they might not be able to grow sufficient quantity or quality due to various factors.
3. Many areas struggle to even meet their calorie needs, and don't feel they have the resources to spare growing plant based nutritional variety.
4. Most of the world isn't logistically well connected enough to receive food from halfway around the world. Likewise, they have no logistics network for export.
5. Most of the world doesn't have the capability to produce exports of sufficient value, or in sufficient quantity, to give them the money they need to engage in those trades. The ability to export means nothing without a willing buyer.
In fact, your argument only proves what I said earlier: That your privileged western position has given you an incredibly skewed belief about how people around the world should eat.
You represent a very small proportion of the world. How you get food delivered to your community, and how you pay for that, is an abberation against the norm the rest of the world lives with.
The main point being - if we all worked together to insure that everyone got the various nutrients they needed, we could feed the world with far less work going into agriculture.
Pie in the sky nonsense because you can't replicate what you enjoy in the west over the entire world by just decreeing it should be so. You need a realistic plan - not just platitudes.
It's not a realistic plan because how the west acquires it's food isn't realistic to begin with. It's inefficient, wasteful, ecologically unsustainable, and not resistant to catastrophe that would shock the delicate system we've set up. It's also entirely dependent on expensive and technologically advanced logistical infrastructure and machinery. Which is not something you can just pull out of your pocket and start passing out all over the world like candy.
As it stands, some countries (like the U.S.) feed animals the lion's share of agricultural produce. For example, the estimates are that potentially 800 million people could be fed with the vegetation grown to feed U.S. livestock alone.
There's several problems with this statement of yours:
1. Your statement is completely and utterly irrelevant to how most of the world gets their meat. Much the world is not growing grains to produce meat for consumption because it's not economical for them to do so.
2. The USA is a net exporter of crops even after feeding a large portion of it to our animals. This proves that we aren't wasting land that would otherwise be used to feed our people. We're using excess land for it.
3. Even if we grew crops on that land with the intent of exporting it, we'd have no market of buyers for it. Because the people who need it most don't have dollars. Because they don't export enough of significance in order to get their hands on those dollars.
For us to do what you advocate we'd have to have the US government pay people to go farm grain on this land. Not allow people to do anything else with it. And pay them lucratively enough so that they aren't lured away by other more profitable sectors of agriculture. And then after all that expensive subsidization, we'd then need to just go pass it out for free around the world because those people don't have sufficient money to pay for that expensive subsidized grain. Of course, our government would also have to pay transportation and communications networks to deliver it to those parts of the world, because they don't have the means or the money to do so either. Further adding to the subsidization burden.
Now we're getting more into political/social/economic territory than ecology. You might be a card carrying communist who actually believes that is a good idea, but why that would be a horrendous, harmful, and unsustainable idea is another topic of debate entirely. For the sake of keeping things on topic, I wouldn't try to get into that particular debate in this particular thread.