It's IT wages and being able to take a break and think about oneself. When Twitter was called Twitter and I've been there, the core population of trans, lgbt+, kink, furry, whatever communities were those who could afford a brief moment to think about themselves, these later magnfied other folks who aren't as well-off. Being gay or trans is natural as our science says, but understanding you are gay or trans means you have enough time, resources, safety to even discover you are one, not to say about presenting as one in public. Tech persons have a natural advantage here over a doordash delivery guy, but as they show it's possible, many poorer persons show up too. And it's not a coincidence Lemmy is popular in these communities, as it's not only a tech-gated space, it's also a promising safe space where they can be whoever they want without social pressure.

ed: if not for us being that fucked by capitalism, the distribution would be more even

Trans etc. are always a minority, obviously. They would not have to fight for their rights otherwise.

no one should have to fight for their right, but that doesn't change the fact that non-trans people enjoy customizing their os as well. so answer to the original question is yes, it is a loud minority.