> Although there is a link in many cases, there are a lot of cases where there’s no obesity link at all.

I mean, the person you replied to literally said "60% of cases are linked to obesity"

Which obviously implies that 40% of cases are NOT linked to obesity. You are saying the exact same thing the person you replied to is saying, just without the numbers.

I feel like the person you replied to's comment was not stigmatizing obesity at all, in fact learning that 40% of sleep apnea cases are unrelated to obesity entirely probably educated some people that it was less tied to weight than they believed before.