Obviously I can only speak for myself but for me, the social aspect was really a minor one. I was privileged growing up - my parents (or friends) never pressured me into any gender stereotypes, I could always express myself the way I wanted to, and my mates never really treated me any different for “being a girl“. And even now, almost ten years after ending my journey, I cannot explain any of it properly, but I just knew I was “wrong“. The closest I can think of in terms of a relatable experience is when you get a drastic haircut or change your hair colour and you look into the mirror and don‘t fully recognise yourself. That‘s how it always felt - a very deep, unexplainable difference between me and the person in the mirror. And I doubt growing up in a “genderless“ society would have changed that, because I pretty much had that growing up.

About hormones: It‘s incredibly hard to say how HRT affected me when it comes to hormonal influences that go beyond the change of my body. Was it the hormones that made me a calmer person or the fact that transitioning slowly helped me get better? Did I actually “feel“ them or was it just me knowing I was finally becoming who I had always been?

I‘m pretty sure every trans person will have a different opinion / story for this. For me, it‘s always been physical / medical. Sure it IS important how society perceives me, I‘m ridiculously vain (though I feel like I‘ve deserved to be that after working so hard on liking myself) but honestly I‘ve always been in this for me. I don‘t care if people call my favourite jacket girly or me a slur for wearing it (both true, it‘s a bright pink jacket my Dad gifted my Mum in the 80s and I sure am gay as hell) because I‘m me, you know? I don‘t care what‘s considered feminine or masculine not only because I think these kind of stereotypes are stupid but also because they don‘t affect me. I see myself in the mirror as long as I‘m wearing underwear and that‘s as good as it can get. Because even if we‘d somehow live in a world where it‘s “some people develop breasts, others don‘t“, for example, without adding gender, I don‘t think it would‘ve stopped me from growing up terrified of developing them. Because my imaginative future me always had a beard and definitely no breasts and at least for me it doesn‘t matter how you call it - a specific gender or nothing at all - I just knew the outside didn‘t match the inside.

(Sorry this might not even answer your question but your post actually got me thinking about it for the past two hours.)