As someone who is very pro Free Speech and hates censorships in general, banning these toxic social media especially for Kids is a good idea and as a parent, I am all in for it. If you cannot smoke/drink till 21, you shouldn't be able to do Social media till then. It is that bad especially for children.
Yeah, but why not also ban candy, soda, junk food, video games ect? If we can't trust parents to parent their kids then why not ban everything that possibly could be bad for kids?
I will also argue that things like Soda can harm you but are much easier to restrict compared to Social Media access and social media has compounding effects on your mind especially if you are a child.