Bullshit. Identity can be intrinsic and have nothing to do with a sense of belonging. Literally half of the things you mentioned in your list of "subjective" characteristics are as subjective as the pile of dogshit you just stepped in: you can deny it all you want, but the stink and the brown smears tell the truth.
I grew up in this forum, extreme metal communities, industrial music communities, and video game communities. I had a toxic, strained, but reasonably okay relationship with my family; I'd learned how to survive in it and they kept me from having to struggle for survival. You know what happened when I came out as trans?
I got fucking forced out of everywhere except here. I got thrown on the fucking streets by my family and told I'd be shot if I came back. And being an autistic transwoman and seeing how IANAR got talked about made me feel like I was gonna get the boot here too. (Fortunately, these parts aren't bigoted, not even back then -- they just dunk on dumbasses.)
If that shit had one inkling to do with wanting to "belong" I'd have just said "oh, then I guess I won't be a freaky deviant then" and life would go on. I wouldn't be on the street, begging people for money and shelter on a semi-regular goddamn basis. I'd probably still have a lot of friends that stuck by me through some hard times, but whose bigotry meant I had to cut ties for my own safety. I'd sure as shit still have my family. Who the /fuck/ chooses hardship and alienation when they could choose easier survival and having a goddamn chance? What sort of masochist do you take me for?
Sexual orientation isn't subjective either. People have died for it. People have killed over it. People have lost every single fucking thing in their lives for it. Presenting it as subjective, as an ideal some people want to strive for, is pretty disgusting. It's a hard life, you will die forgotten, everyone will curse your fucking name, and you'll lose so much in the process. Why the hell would someone choose to do that, when it's not even something they can play "intellectual superiority" with? You get nothing out of it -- your dating pool shrinks, your prospects in life damn near close, you lose most of what you have, you don't get any rhetorical high ground, you just make yourself a fucking scapegoat. For what?
This is some ignorant shit to write, Johnny.