The RFK Jr. version of health, where health creates health and healthy people don't get sick and the thing that keeps you healthy is /living the right way/ is very seductive to a lot of people.

Health does create health. And healthy people get less sick. Which is clear and obvious, and why things like immunocompromisation is an issue! Just like sick people are more prone to sickness, healthy people are more prone to health. It doesn't make you impervious but, clearly, clearly, clearly, if you're healthy you have a better foundation to fight off unhealth. This isn't fucking rocket science.

And, yes, living the right way does lead to health, but even more important is not living the wrong way.

It also places the burden of illness back on the ill, which decreases the value of human life.

Ah, there we go. It's just identity politics and victim ideology all the way down. You don't get a Sickness Community, and if you do, you don't get to fucking whine about it. Being healthy is better than being sick. Put that value judgement in your pipe and smoke it. People should do everything in their control to be healthy, rather than sick. So, yes, some of the burden to not be ill does rest on the potentially ill. Take care of yourself!