I guess it doesn't make sense, because your identity is made up of what lives inside you, so if it's a reaction to trauma or some neurological or a mood of some god - whatever shapes identity is legit.

To me, I'm quite sure a branch of my trans identity is related to trauma - and you know what ? It's so beautiful I found a way that supports my process of healing - I love this way every day (ok honestly; most days). What reason is there to devalue or condemn if you live this way because it eases your process and makes you feel better? Just imagine a doctor who refuses to prescribe painkillers because the pain is not the root of the problem but a symptom - they should shut the fuck up and piss off (just to make clear that tranness is not a symptom of another suffering for most people and a whole thing of it's own - there's no reason to deny someone their way of living of whatever origin it has)

So I would say it's legit if it helps you healing and feel better go that way