Mmm... I am in possibly an unusual position for this forum, in that I know a lot of trans people younger than me, and a fair number of my age or older.
Of the older ones (40's and up)... I'd say around 50/50 split between those clearly ND (not mentally ill...) and those not.
Of the young uns - every single one identifies as ASD. Most have also some form of mental health issues they publically discuss.
I do think theres something in that. Whilst I do believe a small number of people are genuinely born with a male brain in a female body/vice versa... I do not believe the numbers we're seeing now, are that.
I think it's a response to having a ND brain in a world that doesn't really suit that, in a world that increasingly demands us to be switched on, tuned in, doing a million things at once with zero let up from social pressure... to find our niche, be our authentic selves, find a solution and a label for everyfuckinthing...
And why can't we tell adolescents:
'It is NORMAL that you don't know who you are or where you fit in yet. It is NORMAL that you don't really like your body or feel comfortable in it. It is NORMAL that social situations are sometimes bloody awkward and hard work... this is adolescence. It isn't forever and it doesn't mean you wish you were born with or without various body parts.'