Should it be ignored until it's confirmed to be sampling bias?

It’s something I have noticed. Not a scientific survey.

Maybe trans people are more likely to seek help online. Maybe I don’t count well enough.

I keep an eye out for issues I can offer advise for. I do notice trends after awhile.

The biggest is probably people that refuse to change to try a healthy diet.

Some groups just want to complain about how bad life is. Other groups are trying hard to get better. They take a very methodical approach to treatments and tests.

Lots of people simply need help to know what kind of specialist to see next. Or advice when doctors give really bad advice. (Happens all the time)

The really confusing ones are often taking lots of hormones.

I don't hang out in chronic illness support groups, but I have lots of transgender friends. I know quite a few people with chronic illness, and only one of them is transgender. Yes, transgender people frequently feel more safe accessing support online than in person. Sounds like sample bias to me.

Yes, given the likely outcome of raising the issue, including more discrimination against and negative rumors about trans people.

Or rather, no, like most things, it should be ignored until it's confirmed to have data. That is, things are not (true until fault is found), things are (non-true until factual support is provided).

If everyone is ignoring it then who is going to bother confirming it?

It should be ignored until sampling bias is found to be unlikely. Vague suspicions based on anecdotal experience with chronic illness forums are worthless.

Like long covid?

Like "I can't be arsed to engage, on your terms, with culture war bullshit".