Like, as far as I’m concerned, I’m trans because I chose to be, because being the way I am seemed like a better and happier life to have than the alternative. Now sure, you could ask, “yeah but why did I think that? Why was I the kind of agent that would make that kind of choice? Why did I decide to believe that?”
Yes, this a non-confused question with a real answer.
Well, because I decided to be the kind of agent that could decide what kind of agent I was. “Alright octavia but come on this can’t just recurse forever, there has to be an actual cause in biology” does there really?
In a literal/trivial sense, all human actions have a direct cause in the biology of the human brain and body. But you are probably using “biology” in a way that refers to “coarse” biological causes like hormone levels in utero, rather than individual connections between neurons, as well as excluding social causes. In that case, it’s at least logically possible that the answer to this question is no. It seems extremely unlikely that coarse biological factors play no role in determining whether someone is trans (I expect coarse biological factors to be at least somewhat involved in determining the variance in every relevant high-level trait of a person), but it’s very plausible that there is not one discrete cause to point to, or that most of the variance in gender identity is explained by social factors.
If a brain scan said I “wasn’t really trans” I would just say it was wrong, because I choose what I am, not some external force.
This seems like a red herring to me—as far as I know no transgender brain research is attempting to diagnose trans people by brain scan in a way that overrides their verbal reports and behavior, but rather to find correlates of those verbal reports and behavior in the brain. If we find a characteristic set of features in the brains of most trans people, but not all, it will then be a separate debate as to whether we should consider this newly discovered thing to be the true meaning of the word “transgender”, or whether we should just keep using the word the same way we used it before, to refer to a pattern of self-identity and behavior, and the “keep using it the same way we did before” side seems quite reasonable. Even now, many people understand the word “transgender” as an “umbrella term” that encompasses people who may not have the same underlying motivations.
Morphological freedom without metaphysical freedom of will is pointless.
If by “metaphysical freedom of will” you are referring to is libertarian free will, then I have to disagree. Even if libertarian free will doesn’t exist (it doesn’t), it is still beneficial to me for society to allow me the option of changing my body. If you are confused about how the concept of “options” can exist without libertarian free will, that problem has already been solved in Possibility and Could-ness.
In a sense, that is what is happening when you think in words. It’s called the phonological loop.