Personally, for me it’s the idea that just because you don’t experience something (dysphoria, or being a gender other than what society expects of you) that doesn’t mean those experiences aren’t valid.
I get sooo tired of the response “I just don’t understand! I love being my AGAB! Why can’t you just get over it?”
the fact that just because i don’t “look” like a trans person doesn’t mean I’m not one. Like, yeah, i’m genderfluid/genderqueer in the cool xenogender way and if i got to control my outward appearance i would literally be a decomposing log, but that’s not possible so i will settle for a brown turtleneck and funky earrings. Also, I use any pronouns, you literally cannot get it wrong even if you’re trying to? you do not need to correct when you say “she”