"But what if that kid is making a mistake?!"

Then that is their mistake to make.

Of the already minority population of Trans people, a minority of them report de-transitioning; and a minority of them report doing so out of a sense of regret for the initial transition. Source

I know I much prefer having a minority of a minority make a mistake and course correct, than having a blanket ban on all transitions cause the wrong people think they know better than the lived experiences of Trans people.

I wish I could have transitioned as a kid. I fantasized about my puberty magically being the girl puberty, that my parents made some mistake and I was really a girl. I hoped every day I would start growing boobs... I never had the vocabulary or understanding to verbalize any of it, and I had such a warped idea of what trans people were I thought it was obvious I wasn't one of them. The disquiet never went away. Hating myself and my body never went away. I tried so fucking hard to be a man, but nothing I ever did made it feel right. That was the life of someone who didn't know what was happening, and I know now it would have been exponentially worse if I had, because I felt that after my egg finally cracked in my 30s. Just a few extra months of waiting was almost unbearable. I can't imagine going through that as a kid, knowing I'm going through the wrong puberty, watching my body change in all the wrong ways while my parents gaslight me saying it's for my own good it's just a phase I'll grow out of. People who do that to their children are scum who don't deserve to be parents.

Also, if anything, puberty blockers let kids be kids longer. I just got curious about whether delaying the development of female secondary sex traits would allow someone to grow taller, so I looked up puberty blockers on Wikipedia and encountered this:

In 2016, the FDA ordered drugmakers to add warning labels that state: "Psychiatric events have been reported in patients", including symptoms "such as crying, irritability, impatience, anger and aggression."[68]

It’s not like crying, irritability, impatience, anger, and aggression are the most common symptoms for absolutely everyone on earth during the life stage at which puberty occurs, or anything. I wonder if puberty blockers have been associated with a strong peer influence and a desire to separate one’s identity from that of their parents. Maybe a predisposition towards fashion choices that will be embarrassing in the future? At least they don’t cause acne…

People, who are insisting on children can't be trans are just attempting conversion therapy.

The issue is that when a conservative says "Let kids be kids" they mean "Kids are stupid, let them be stupid, and make choices on their behalf instead!" While when a progressive says it they mean "Kids are smart, give them the skills and the trust to make choices on their own!" And they rarely realize that the phrase can have another meaning.

Children aren't getting surgery to transition. Child transition is largely social. Any child getting major life altering surgery is doing so under the guidance of a whole team of medical professionals.

Im never going to be a productive member of society because of the things my parents kept me from, did to me.

You wouldnt believe the shit ive done to that society in decades since. I dream only of revenge for the lives stolen from me. And trauma, of course.

i have known i was trans since a bit after starting to notice the effects of puberty (for over 3 years i (dont) think, i am definitely misremembering something, the timeline is not adding up by several years unless i just did not notice the effects of puberty for several years)
i still have to wait for over 2 years before safely transitioning

its been torturous and i still have so long left
i cannot imagine how people who have to put off transitioning for decades manage to survive