Some comments, in the spirit of wanting to help sharpen or develop the concept:

Re: "If a child has expressed a wish to be the opposite sex, this is indicative of having been exposed to paraphilia..."

There are historic examples of children in the past wanting to be the opposite sex. I mention this not to say those kids demonstrate true trans, merely to say the desire can spontaneously appear. The clinical cases I'm familiar with are from the 1950s-1970s, so it's possible those children had exposure to the idea from the adult world, as people like Jorgenson were already known (though the media was much less saturated with the concept). Going slightly earlier, The Well of Loneliness from 1928 captured a childhood of male identification that many female inverts of the era found relatable.

Re: "... still harmful, abnormal, and disrupt the ability to form intimacy between partners."

You may want to define what is healthy and normal. The challenge is people will say "Who are YOU to say what's healthy and normal???" I don't know if it's possible to get out ahead of that or just by fiat declare/assume people know what you mean. The project of the sexual revolution of the last 70 years has been to erode boundaries, usually with the tactic of declaring there's no normal outside of constant pleasure seeking.

Re: Exposure, with some personal observations:

I call modern gender ideology a transsexual cargo cult. Last year I heard my preteen daughter's friend say "I feel like grownups don't understand LGBTQ issues" and my kid enthused "oh no, not at all." It was both irritating and cracked me up. That friend, a girl, now "uses" they/them pronouns. I'm constantly having to deal with the fact that cross-sex identification for TVs is a paraphilia, there are preteens in my midst who have no idea what they're talking about, and other parents in my life who facilitate the nonsense. The self-replicating nature of gender ideology takes certain behaviors/concepts to a place so far removed from their point of origin that the entire thing is whitewashed. I can go on, but the "it's just out there, in the air, everywhere" element is going to be the hardest thing to clean up (see earlier "who are you to say what's healthy and normal?" comment).