Now that I'm really thinking about it, I kind of see a way to explain this that might make sense that both you and Sloane touched on: I feel like basically as a young child, I accidentally embodied QT. So, the conclusions that QT adolescents, teens and adults make and assert about sex and gender and stereotypes are conclusions naturally reached by a child who wouldn't know any other reality. That's sort of how I see it, because much of what QT espouses is in line with my thinking as a child. That would explain why I feel like those views are immature or 'childish', just because that's the kind of thinking I would have as a child. I think those beliefs only really hold (or hold as best as they can) if there is no other point of reference. So, to a child like that sex truly is just a blend of superficial and stereotypical things that have nothing to do with sex. Maybe that's not the case at all, though, but that thought struck me as I was driving home today.

ETA: OK so maybe QT was derived from the lived accounts told by adult transsexuals who grew up with dysphoria from childhood, and it's all been misappropriated by people who do not understand what this experience is like. So, it's the beliefs and accounts taken from transsexuals, but trying to apply them to people who have not lived with this confusion their whole lives--sort of akin to trying to sing a song of which you know the lyrics, but you don't know the melody. Obviously adults and older kids can become dysphoric, too, but I think the treatment and methodology of how to deal with it is just taken from what is standard for transsexuals who grew up this way.