How do you manage boundaries with Wellness Zealots who you don't want to totally cut out of your life?

(asking because I do not know how to talk about anything with somebody who thinks all chronic illness can be resolved if you try hard enough, and I'm wondering if anybody has found a way to do it safely.)

There is a very religious quality about this, tbh.

So many people have a belief structure that is threatened by the existence of incurable bodies and I just don't want to engage with that whole thing anymore.

I also think I might have a confounding circumstance with somebody who works in that space, so even if we don't talk about my health, their entire life centers wellness in a way that isn't avoidable.