Again, you are simply turning the discussion to what you want to debate, which is medical intervention in the young (teenagers), not what is being discussed here. But as you seem to want to make that stretch, then, my view on that, and indeed all gender reassignment, happens to be that if there were more acceptance of non-binary behaviour then people wouldn't feel so forced to change themselves to fit perceived societal norms?
Second point, I couldn't give a shit, as you don't want to have a rational debate, just be outraged.
Third point. Oh, I can, I remember very clearly the time and the place when I was playing with my sister and her girlfriend and we all decided it would be good fun to dress up. The look of a mix of sheer horror and disgust on my Dad's face when I enter the room with a fluffy coat and my Mums shoes is something etched on my mind.
I'd say the majority of transgender folk knew how they felt at that age, not uncommon at all.
Have I now disgusted you?
P.S. After I transitioned, I turned my life around from being a drunk, continually high on cannabis, and spending every second night on the phone to the Sarmatians. I went back to school to get my degrees, masters and doctorate, got a good paying job and a house, and became a mentally stable, tax-paying upright citizen. Following which, my Dad was the best Father I could have wished for. And that included us going to watch the City together once more.