It is something you can come out as though, as if you choose to transition, eventually you do have to 'come out' to someone - even if it's only medical professionals.
It can be unsafe for people to come out in real life, but in fiction I'm not sure how it's unsafe for characters to come out as they aren't real. It could be dangerous to have transgender characters in your work, I suppose, but then it would be equally as dangerous to have LGB people in your work in general and would come down to it being a real life issue. I don't understand this point.
This isn't true 100% of the time. I have my identity on my profile, and I know others who are very upfront with their identities, trans or cis, in theirs as well. Sharing ones identity does not mean one is in activist, it just means one is 'out' usually. Which could be considered a political statement, but doesn't mean someone is marching in the streets and arranging trans cookouts.
Being trans has had a HUGE impact on my romantic life, my experiences with people and the world around me. There's definitely a space for that which intersects this.
Being trans isn't just a medical thing though. While taking hormones and surgery may be part of it for some people, it is not everyone's story. Insisting on medical transition to define trans experiences is exceptionally narrow and harmful, and it also minimises all kinds of social aspects of transition.
So that's why that might be here. Because it's far more complicated than you stated.
No problem! Hope you find them useful. PhilosophyTube is more philosophy than linguistics based (well, duh) but that one video goes into language and how it pertains to self and what words can mean in a philosophical sense - perfect for discussing art! It's a fantastic resource so I hope you'll enjoy it! (It's also his only musical lol and his coming out video - perfect for this thread probably).