I'm not gonna wade into all that crap, most of which is above my head anyway, but I firmly believe these things.
1) COVID is "man-made" by the Chinese Communist Party. (I'm still not sure if it's release was accidental or intentionally to test its effectiveness)
2) COVID will be with us forever, just like the various flu strains and common cold strains. How it mutates remains to be seen, but I HOPE, as it does, it becomes less and less problematic.
3) For MOST of us, either via vaccination or by getting sick from the COVID, we will build a natural immunity to MOST strains, and for MOST of us, it won't be much different than catching a cold of flu bug.
Does any of that mean we shouldn't take some precautions? Nope. I'm not a masker under normal circumstances...but WILL wear one when it's necessary...or when I get sick and have to go out in public.
Does any of that mean we shouldn't take care of ourselves? Nope...proper nutrition, at least as much as possible helps the body...and if you're a believer in supplements/vitamins beyond food, go for it. To me, they always just seemed like they make expensive piss...but that's me. You do you.