Maybe? I didn't write "most", I wrote "many". What do you have a problem with syaing "many" instead of "all"

I suffer from obstructive sleep apnea, but I would never, ever tell people that their sleep apnea HAS to be obstructive too.

It's like telling a Type 1 Diabetic that they had a friend with diabetes that "cured" themselves with diet. We're talking about two different problems, and we don't discount the Type 1 Diabetic because there are Type 2 Diabetics.