I think I’ve read once that niche communities tend to have notably higher rates of things like trans people. It might be that it’s because these niche communities are more welcoming, so those people like LGBT+ who feel unwelcome in more mainstream places find a home there and bring their friends.

I don’t remember the source and I’m half-remembering the point anyway, so make of it what you may. The context was actually speedrunning (like AGDQ).