The idea of banning minors from using social media is at its heart an attempt to punish victims instead of going against the perpetrator. If minors are more easily victimized by the predatory practices of large tech corporations it's not their fault. The blame lies squarely on the corporations. They must stop using predatory practices. And that's doubly important because those practices hurt adults and minors alike.
I mean, nobody ever went to jail for making a children' cartoon the mascot for Camel cigarettes either.
Even people who legitimately care about protecting children from harm aren't willing to actually confront the causes of that harm.