Sorry, far too many wildly extravagant claims, but on a total of zero actual evidence or science. You "know" that autoimmune diseases didn't happen to humans long ago? How can you be sure that it was just that earlier humans had such a miniscule understanding of how our bodies work that they just ascribed everything that they couldn't explain to curses, witchcraft, wrath of God, and so on?
Humans have increased in their knowledge and understanding as God designed them to do. But man's acquiring of knowledge and implementing his accomplishments, gave him a false impression of his own worth in the scheme of things. He has now placed himself on God's throne, seeing himself as the creator of all things that matter in his world...except that none of it has contributed to a better world in the big picture. The downside has always outweighed any good that was accomplish. How can humans who think they are so smart, be so short-sightedly, stupid?
As they say...."none so blind as those who will not see". If you are shackled to your own way of thinking then nothing I say will make a scrap of difference. I am merely a messenger.....you are free to dismiss the message.
Auto-immune disorders have exploded exponentially with human "progress". It isn't that they didn't exist before, but that, as the human gene pool deteriated, then more and more illnesses manifested that were not in evidence or even identified until recent centuries. Human imperfection goes back to our beginnings. It's been on a downward spiral ever since. To me, that is quite evident.
But the biggest claim of all, you actually claim to "know" what "the life our Creator planned for us" is about! If you don't, then it would be absolutely impossible for you to make the statement that we are so far removed from it.
The Bible clearly states what God intended at the beginning. All we have to do is read Genesis and think about how we started and what went wrong.....and what we lost and how God shows us the way he gets it back for us. This is the Bible's overall theme.
All are free to accept it or to dismiss it. It's a choice....and why we have free will.