I think you make a valid point that obsessing over this stuff is weird. Also, does nobody else consider if kids are being overexposed to the complexities of adult sexuality, and that we should just let them grow up with a little more innocence? Questioning is an important process to developing a stable and secure identity. Let kids be themselves, they'll puzzle it out eventually!

Because when someone proclaims they have a "trans kid"—especially when they haven't even even reached puberty, and I would say even teenagers at this point—that's placing an expectation on how they will feel and see themselves after they mature. Projecting those expectations and confirming them is deeply wrong, since it denies children the ability to explore and find out where they fit into the world, so pushing this idea into young minds can only lead to harmful, irreversible decisions.

I don't think anybody is saying they will otherwise grow up to be gay. (Citation needed.) Saying the child might just be gay is the opposite of that. It's specifically avoiding any expectations, and it's not something that they can't figure out for themselves later after having at least been through a relationship or two on their own terms.

I think it's the declaration that they "will" become something that's the weird and creepy part—and it doesn't matter what it is.