it's actually really weird to me that a lot of adults don't seem to remember the worst bits of being a child. were you not horribly aware of when adults were talking down to you as a child? don't you remember how little autonomy you were allowed, even when it came to things that seemed pretty harmless? don't you remember the times when adults would seemingly be assholes to you for no reason? even if you had nice and reasonable parents, didn't you ever have teachers or other adults in power who treated you disrespectfully? didn't it sting no matter how people justified it?
especially when I was a teenager, it seemed obvious to me & to most of my peers when an adult wasn't treating us with respect. you could almost smell it, in certain classrooms. there would be this palpable, shifting undercurrent of teenage dissatisfaction whenever some teachers started talking. and it made a lot of the kids act out! which of course made the teachers try to exert their power, which never worked because nobody respected them, which made them get more draconian, etc.
as a teen, I didn't really get why my peers and I seemingly had a superhuman sense for when an adult was on a power trip. but now I think I get it. kids are systematically denied autonomy, respect, and consistently have the validity of their experiences denied. like, flat-out. they're a vulnerable class of people made even more vulnerable by their lack of societal rights. being disrespected as a kid is so frequent that I would say it's a defining experience for most children. is it any wonder they tend to pick up on when an adult doesn't see them as worth listening to?
so yeah, of course a ton of kids want to be treated "like an adult." to them, that's synonymous with being treated like a human being worth listening to. it's up to you, as an adult, to understand that wish for what it is, and behave accordingly. you don't gotta be a child psychologist. you don't gotta be perfect at it. all you have to do is remember how painful adult disrespect could be when you were a kid & do your best to act with some compassion.