Definitely part of it. I'm a huge nerd, but years ago raced motorcycles in the US. The demographic makeup difference between that and going to a local MTG event is insane. Seriously, out of hundreds of people at a race track at a time and a decade of doing this I know 2 openly gay people and 0 trans people.

Not sure you could go into my local MTG shop without seeing that many gay/trans people. It's lovely, but I think highlights the bias in what hobbies people will lean towards or how honestly they'll be about themselves depending on the social situation