I think mostly what young fandom types (and I guess younger people in general) who are very very invested in the idea that “20 is still basically a minor” need to understand is that the feeling of “I’m just a child pretending to be an adult, and everyone else around me is a REAL adult” is DEEPLY universal (and won’t stop, ever, by the way, sorry!) and also is not, like, praxis.
Believe me, I get it, but the self-infantilization needs to stop, especially when you’re trying to engage in conversations about actual children and the harms they can face. Yes, it is scary to wake up and realize you’re 22 and you still feel like you’re 15, but it happens to all of us. You’re an adult. You have to deal with it.