I don't disagree with most of that, and would add that pornography (which is apparently seen by a majority of older children) makes the SM thing even worse.
I'm unsure about the point that girls learn to be physically weaker, but doubt that there is much of a link between that and the desire to transition even if it's true, and in any case the differences are very apparent after puberty.
I agree that tasks are not gender related, which is why I don't believe in gender transitioning, and keep coming back to the question of what people think they are transitioning to and from. If it's not tasks, and it's not clothing, and it's not pastimes, what is it? It can't be biological things, as they can't be reproduced in a fully functioning way, so what is left? I would really like an answer to this question, but have never had anything close to one.