If parents dont care or approve of their kids using social media then the kids will keep doing it. Its still important that the top officials in government are warning adults that its not safe for children there, because some people dont know or won't trust anyone else.
The problem was thinking it was okay for kids to be on social media, and this fixes that. People on here keep saying the problem being fixed is how to prevent every child from getting on social media, but thats not what's happening.
This also allows us as a society to punish parents who break these laws or allow their children too. We have to be able to signal to each other in society when something is harmful, whether it affects autonomy or not.