I think a lot of it comes from a ton of trannies being autistic and not knowing how to interpret their thoughts and feelings about sex, both the concept and the action. Understanding the opposite sex is something that requires empathy, which is something people with autism don't possess. They can't even perceive of an experience beyond someone being a set of objective attributes that comprises the things they are. This makes them assume that the idea of the opposite sex as something you can attain piecemeal to apply to themselves, through checking enough items off a list. They simply do not understand the human desire for interpersonal connection beyond selfishly wanting something.
Well, sure, but there has to be an extra step (or more steps) that leads from "not understanding how humans work" to "I must be different that what I was biologically born as".
If being autistic is a strong correlation, your reasoning indicates that being trans is somewhat inevitable. Except it can't be, because if an autistic person can't understand how one sex works, it doesn't mean they automatically slot into the other. In fact, it's more likely and intuitive that they're asexual, simply because they can't figure out anyone.
Transitioning is stupid in general to begin with.
If anyone who is trans outright asked me why I'm against the concept of being trans (at least as we are dealing with it as a society currently), it's because there is no way it can't be a self-harming process, and it relies on treating trans people as sort of exceptional from the way we treat everyone else in a way that makes them perpetually insufferable and exhausting, that never have to work on themselves to accept what they are (when a healthy person wouldn't outsource that acceptance to everyone else) and the only beneficiaries from the process are Big Pharma and predatory doctors.
All because we've been demanded to kowtow to everyone who says "there's this thing in my head that says my body is wrong". And the fact that people who think they're trans can't be bothered to consider that maybe this could be a
bad thing should be more of a problem than it is.
But that doesn't fit on a bumper sticker and requires considerable thought. So, you know, that doesn't outpace how the normal trans advocate
feels about it.
The whole trans thing will die down once people stop treating it as a path to praise and validation. That shit can't come fast enough.