Almost every trans adult was a trans kid at some point.
You don't know that. Maybe you could make such a claim back in a time when transition was a last resort for people with gender dysphoria, but that isn't the case anymore. As gender experimentation becomes a matter of self-exploration rather than clinical dysphoria, those who view clinical dysphoria as a necessary characteristic of transgender people have become a hated minority called "truscum" by other trans people. The truscum are viewed as gatekeepers who are "invalidating the existence of other trans people". Transition and gender experimentation isn't just for kids with clinically diagnosed dysphoria anymore. Gender experimentation is for everybody! In recent years we have been inundated with adults "becoming their authentic selves".
And yet we have this motte-and-bailey type situation where protecting children with gender dysphoria is always the castle to which the gender-people retreat when faced with pushback.
Sure and we're seeing that debate play out now. I have zero doubt that there are cases where hormones or puberty blockers are appropriate interventions for prepubescent kids experiencing gender dysphoria. I also have zero doubt there are cases where they are not and these all should be determined by medical professionals. Banning such interventions outright (as the UK recently did with puberty blockers, which are a temporary and reversible) means condemning members of the former category to a miserable existence at the worst possible time in their lives.
How temporary and reversible puberty blockers actually are is a matter of some debate. The degree to which they impact development into adulthood isn't fully known, and there are concerns regarding the impact of this treatment on brain development and bone development. Puberty blockers are FDA Approved... as treatment for prostate cancer. Using them as a treatment for gender dysphoria is an "off-label" use, and the effects of doing this haven't been studied well enough to support the claim that they're safe, temporary, or reversible. Proponents claim they're like a magic pause button for puberty and that once the treatment is ended your body will pick up where it left off without missing a beat-- that's not proven.
Also not proven is that medical intervention is more effective than psychiatric therapy in helping young people with gender dysphoria.
Regarding the UK ruling, the Keira Bell case, a key component of that is that adolescents aren't capable of providing what is considered informed consent.
The court case also cast a light on the UK's Tavistock Gender Clinic and the quality of guidance provided by the professionals there. And the Bell case wasn't the first time Tavistock has been found wanting. They've seen whistleblowers, massive turnover of doctors due to conflicts and ethical concerns over "fast tracking" adolescents into medical transition, and one point the whole board of directors was sacked. It's been called a national scandal.
Canada and the US don't even have a Tavistock. Here it's a Wild West.
-k