In relation to the recent Indiana ban for transgender youth care, some thoughts that I think have a broader outlook as rebuttals of a commonly held trope that adolescents can't give medical consent to gender treatment.
Also consider this BBC article about a judge deciding under 16s might not be able to consent to gender care in the UK AFAIK this had been later overturned on appeal . As for one of the cases explored in the dishonest Reuters article debunked by Vaush it turns out one of the cases (the trans boy one) under Ontario laws where he lives, he had medical consent since he was 15. So Why is it different for transgender care specifically?
Here are my thoughts:
Adolescents presented as "technically kids" always gets my gears grinding, since it is dishonest to equate adolescents and children on so many levels. For example they might have medical consent which should be enough. They might drive in some places, and also they can have intimate relations to another adolescent. Toddlers can't do any of that. There are grades of consent that are legally and rationally different between adolescents and kids, so "technically a kid" is a far fetch, a dishonest prevarication, and just plain wrong on so many levels.
They just don't say that when kids of essentially the same age are allowed to get married and become "technically" parents. They don't say a word for actual infant mutilation in the cases of intersex genital normalization surgeries, nor circumcision. They did not get out of the way to ban breast enhancement in teenage cis girls. They just never fucking uttered "they are technically kids" in any of these equivalent cases.
And there is another underlying problem, that most advocates fail to bring up while they are distracted by bullshit like the "technically kids" fallacy. That in contrast to strictly sexual orientation and needs that start during and after puberty, gender identity is something that manifests way earlier, typically in early childhood. This is extensively documented before the 2020s craze with transgender condemnation.
Mind you, transphobes have dealt with and exploited this fact for a long time. It is not that they do not know it. They do, but they strategically suppress it all the same. There are at least two ways they know and leverage this fact: in separating trans people into genuine and fake, like with the "homosexual transexual" pseudoscience; and in developing and popularizing concepts of social contagion of transgender ideation in adolescent. Even though implicitly, both notions require that true transexuals manifest themselves during childhood, but none of the real trans people we hear about are true trans. This is in turn the True Scotsman fallacy.
Aren't there some medical side effects of taking them for many years? If they're starting at like 11 years old, then its probably best to make a decision about which hormones they're going to take by like 15 IIRC.
Ultimately though, even if the idea effects are actually just a dog whistle of transphobes, adolescents are taking hormones with or without medical intervention and taking the wrong one can do permanent damage to the body. The only person who can even remotely know which is right is the person themself. If we allow and adolescents to go through puberty, we"re already admitting that hormones are something adolescents should be allowed to take and the only difference in which ones they are allowed is because transphobia.