I promise I am not a reactionary, but I am somewhat uneducated on the subject so I might say something offensive accidentally, sorry in advance about that.
So, does gender dysphoria stem from a disconnect between the body and some "gender socialization" function of the brain, which could be solved by getting socialized and treated by everyone as the correct gender from the start, or something that stems from a disconnect between the brain and the actual body parts and hormones, so the transition is needed to alleviate that, or both?
I know what my body feels like when I forget to take my estradiol shot. I know what it felt like before I started taking it in the first place.
And capital-S Science has a long enough history of completely ignoring us or trying to make us fit into little cis-centric boxes that I don't care what it says about us and our origin, to the degree that Science is even looking into that for a reason besides eugenics.