@Hibari
Zucker's methodology is straight up conversion therapy.
Denial of identity, enforcement of stereotypes and norms and is flat abusive.
I see people say things like "let kids be kids," and "let kids do what they want," "let kids play with the toys they want." Zucker's whole premise is not doing that. It's about forcing kids to do things they don't want. Taking their toys away. Punishing them for liking the "wrong," thing and encouraging them to like the "right," thing.
I had a Google for some old articles mentioning Zucker - since anything Pre-2010 is much more balanced than the complete woke dogma we see now.
And despite my disagreeing with every post of yours I've seen on here, Hibari, I actually agree - partly - with what you say about Zucker's methodology. According to this 2008 piece from the Atlantic he does indeed recommend locking up all things of the "wrong" sex for a child struggling with their gender: https://www.theatlantic.com/magazine/archive/2008/11/a-boys-life/307059/
I disagree with this methodology because colours, toys, clothes are not just for one sex or the other. Girls can play with trucks and wear blue. Boys can play with dolls and wear pink. Zucker's focus on denying that to children does indeed sound damaging.
Where he is correct, however, is when he says:
"If a 5-year-old black kid came into the clinic and said he wanted to be white, would we endorse that?” he told me. “I don’t think so. What we would want to do is say, ‘What’s going on with this kid that’s making him feel that it would be better to be white?’”
And:
"One has to think about the long-term developmental path. This kid will go through lifelong hormonal treatment to approximate the phenotype of a male and may require some kind of surgery and then will have to deal with the fact that he doesn’t have a phallus; it’s a tough road, with a lot of pain involved.”
So where he is sensible is in at least waiting and watching and, if possible, getting a kid to feel comfortable in their body (although I disagree with how he goes about doing that) because the reality is humans cannot change sex.
So the only other option is one of infertility-causing drugs, coming to terms with looking like the opposite sex but still not having a functioning female/male reproductive system (thus hugely limiting your pool of romantic partners), potentially not ever being able to have sex and/or undergoing dozens of surgeries, being a medical patient for the rest of your life etc.
Who on earth would want that for their child if the alternative - let them get to puberty and see what happens - could potentially mean they desist?
Anyway, the article is pretty balanced and worth a read.