I am really feeling kind of snarky about this, so you might want to discount my opinion.
Hmmm. If that's the threshold, then people should probably discount all my opinions.
I guess I think there is stigma against chronic illness full stop. At some level we need to fight that stigma more directly, rather than getting stuck on the name. It's distractor from the fear and distain for sick people. I also think that this disdain is faced by people with all chronic illnesses. All (whatever the diagnosis) of us are pegged as lazy, malingering, not wanting to do the work to get healthy (with the underlying false assumption that hard work is the case of health).
This is the fundamental problem, but I really have no idea how to address it.
The moment you start talking about chronic illness, you're immediately discounted and recategorized into 'crazy' or new age or dumb or whatever. Even if you're a licensed MD, the second you say you have Long Covid, your colleagues are going to view you differently. I know people who have experienced this.
I didn't mind when the Simpsons made fun of everyone: South Asian Indians, Jews, alcoholics, police, lawyers, etc. I wonder if all those have become un-PC, but maybe it's still okay to make fun of the chronically ill (something they did in this 1991 episode). Hopefully not, but maybe I'm not up on my Simpsons.