Where does the authority to do this come from though?
The point of a gun, as does all authority in the end, if required, often morals, ethics and common sense are enough more most people. There are miscreats, that's a fact of life, we have tried and true methods for dealing with them, as you know.
Science indicates that obesity is bad for people. Are you saying you'd be okay with some kind of forced obesity reduction actions on the part of government ? Don't healthy people have better immune systems ?
Drunks and people who smoke, as are people who live like pigs are at mortal risk, not just the elderly and vulnerable who have no choices to make. The government is not everybody's mommy, even in a welfare state, there's a thing called personal responsibility.
If you want to improve your immune system Rob and a 70 something year old guy should, I recommend hot baths, hot as you can stand and then a cold shower to make ya dance and scream, to build up your innate immune system. Suffer or die is my recommendation to you Rob, I heartily recommend it too. Post a video of yourself in the monkey suit undergoing the hot cold "therapy"! Check out the last couple of medcram videos I posted for more info. This is a natural vaccination alternative Rob, one anybody can deploy. Those old Finnish guys were onto something when they ran from the sauna to a hole in the ice butt naked. Don't take my word for it, google thermal hydro, or hot cold therapy, or even Wim Hof if yer into macho manliness stuff.