some people are chemically different enough from their biological sex, but similar to the opposite sex

I don't know what that means, but I don't see how that leads to "trans is real", which almost sounds like an arbitrary judgement call over anything describing reality.

I could be a female and a lesbian, tomboy, uncomfortable with my female body, 100% interested in manly pursuits, lacking any feminine traits or inclinations, yet I'm still a female. "Trans" is a self-applied identity which I would have no interest in adopting. People are certainly free to do so, but that doesn't mean it's science beyond someone writing in a journal describing what "trans" people are like. Yet leftists always defer to those journals in place of arguments, so even intelligent young people are left saying "Well it's kinda weird, but I can't argue with science." It's treated as PROVEN. You can't dispute it. This kind of Appeal to Authority and deferral to experts is one of the roots of all the poisonous movements today.

I also think that Chiropracty is a more legitimate school of medicine than Sociology is a legitimate field of science, so I'm biased.