One reason I have been suspicious of the idea that letting covid just ride and the population acclimating to a general immunity being the only real solution in the long run, is that I think people have not really thought through what "long run" means. It is true that our species coevolving with the virus species is the most reliable long-term immunity. After all, the New World populations were devastated by Old world diseases because they were novel to them, while many of the Europeans survived each bout of hantavirus or smallpox that spread. Here's the problem: many of the Europeans survived. Not all, even after thousands of years of (general) exposure to these diseases.
I posted Tom Wessells recently talking about forests and trees, mostly. In this one he is talking about coevolution. He has zero intent to say anything about covid - how could, he, as the video is from 2019? Yet in the context of talking about invasive species, including fungi and Eurasian bittersweet (which he correctly calls "the northern equivalent of kudzu") he mentions this very principle a few times, that even with a very destructive start, species eventually move to an equilibrium and become mutually tolerable, and then even mutually beneficial. Great! Bring it on!
Except it takes a thousand years, minimum, and often even that is not enough (and he doesn't like the "short term" consequences of multiple centuries all that much, even when it is just plants). As in malaria. Or smallpox, eventually defeated by vaccination, not adaptation.
Humans aren't chestnuts or ants, no. But the principle is the same. It seems very tempting to say "Look, we just have to bite the bullet and get to the other side of this disease and we'll be fine. Ugly, but the only way." It would be fine, if it was fairly brief and very few of us died getting there. Yet that is surpassingly unlikely. It's an attractive myth. Boris toyed with it in Britain but was talked out of it. The Swedes had an early go at it and then abandoned it. It's not a crazy idea, because the principle underlying it is real. It's just a wrong idea when you look at the details.
Well, the video is a good college level biology lesson anyway, even without application to human diseases.