Gonna repeat myself a bit, but the reason the US government is requiring vaccines is because people fucking lie, and enough people started lying immediately that the government knew it was gonna be a problem.
Like, the *first week* the county required masks, I had people asking for help printing off their fake mask exemption cards, coming in with catcher's masks, and claiming they couldn't wear a mask because they had asthma and hypoxia, which means they if they got covid that would very definitely die. Amazingly, that last gal's son also had asthma and hypoxia, as they both ran around town lugging 50 lbs bags of dog food into their truck and basically showing zero symptoms of having reduced lung capacity.
Maybe it works different in your fancy other countries where people might pretend to give a shit, but that isn't the USA. You put natural immunity exemptions on your vaccine requirements and America's Frontline Doctors will be selling telehealth positive covid tests for $20. So the government is requiring standardization. That's the problem with living in a country that hasn't been sane or rational for decades
Edit: Like, shit man: I deliver medicine for a compounding pharmacy these days. You gonna tell me that every hospital in western Montana is incompetent because I need to wear a mask making deliveries? That pharmacy regulations are junk because wearing a mask in the clean room is useless? That I'm just hallucinating the number of teachers and nurses I personally know getting covid and how personal friends of mine can't go three weeks without quarantining pending covid test results?