"If you had that condition you wouldn't be able to do [x]" is one of the most pernicious & dismissive phrases in chronic illnessdom.

Do you know how often I see this exact exchange?

A: I'm having these weird symptoms.

B: That sounds a lot like [diagnosis].

A: Oh, we ruled that out because my symptoms aren't very severe.

B: That's what I thought too until I realized that healthy people have ZERO symptoms.

Also like, a lot of people with chronic illness can *physically do* most things, but face severe consequences and thus try to avoid doing those things as a matter of survival.

What you are capable of forcing your body to do should not be relevant. https://twitter.com/bennessb/status/1274416807332532225?s=19

Relevant, equally harmful corollary:

"If your symptoms were that bad you would already have a diagnosis."

Nope. That's not how it works. Not at all.