1. With a few very very specific exceptions that should be respected.
The reason the mandates are so sweeping is because Americans are intensely litigious and making them targeted would potentially run afoul of all sorts of laws like the ADA.
And this problem might be unsolvable - if that's the case then the vaccine mandates (which do lower risk) will probably become as set in stone as MMR shots which, if you went to school in America, you almost certainly got.
2) Sterilizing immunity is a pointless distraction. Seatbelts don't provide 100% protection in a car crash, surgeons washing their hands doesn't prevent 100% of infection, and having smoke alarms and two points of egress in a bedroom will not 100% save your life during a disaster. In fact, I can't even think of a mandated public safety feature that is 100% effective.
You know you can live with one kidney just fine.
So does natural immunity, but this is being suppressed.
> By not getting vaccinated you’re a potential Burden to the health system
This doesn't mean you can MANDATE someone to take the vaccine. This is a violation of medical ethics to use someone instrumentally for the sake of some other good (which is precisely that you're describing).
2. Living in a society means you can mandate a vaccine - it means you can mandate a whole lot of things. I'm still unable to drive a tank to work even though I probably wouldn't hurt anyone - how unjust is that! Being part of a society comes with rules and requirements you need to follow - even in freedom loving america. There is a way you can leave that society - it is still quite possible. Buying a cabin in remote Oregon won't suffice but you can emigrate to an area of the world that doesn't effectively enforce laws - they do still exist.
So no, nobody is mandating that your body receive the vaccine - the mandate is that if you want to keep living in a prosperous society you need to do the absolute minimum to keep everyone in that society safe.