Yes it is. The argument is that people having a moral panic over kids getting gender affirming care (which they erroneously believe to be bottom surgery, that's another can of worms), which is shown to be safe and effective, are not having the same moral panic (and even are likely to be the same demographic enabling this behaviour) over actual, proven to be a disaster for your health activities, shows that all these people are simply transphobes.

you missed the point. children can give informed consent to things that might prove harmful down the line, like ballet.

not so much for ADHD meds, because parents often force these on them to make them compliant and as punishment.

there is no medication without side effects. ADHD meds can have bad consequences, but we should still allow people to take them based on informed consent. apply the same logic to kids on HRT.