More unfounded hyperbole. "All we've gotten?" No. Even just the realization that washing our hands can knock off germs and viruses we might otherwise infect ourselves with is HUGE, and was a "win" that we came to not by shrugging our shoulders and lamenting that "it's all subjective anyway", but instead by coming to realizations about the fundamental truths of the reality we inhabit, and using the information to our greatest advantage. I would hazard a guess that the washing of hands (including surgeons "scrubbing in" for surgery) has saved far more lives than have been taken by any single war. Even war-time conditions themselves improved greatly with the knowledge of germ presence and how to minimize it. And that's just hand-washing alone.
Nope. Not even close. Going back to the same example from above, germs exist, and they can ravage the immune system of any of us. It isn't like I can just imagine that someone you see as sick is instead well. That DOESN'T work. That alone proves that there is a world of things "happening outside ourselves" that is entirely consistent between two observers. To claim otherwise is just crackpot theorizing of little to no actual value. In fact, I would argue that any sharing of items of completely subjective value (for example, what a given person thinks of a particular artwork) is an extremely minor "help" in any way. Of far more utility is the realization of what we do share, definitively, and how we can use that to our advantage, or avoid it because of its detriment. When we can share information like that, it is so many times greater a help to all of us than is your very particular opinion of something that only holds sway over men's imaginations.
