Ok, imagine a law punishing a platform comes out. How will it be enforced? You can fine the companies but they can just close presence in europe. YouTube will continue to work even if all the YouTube's servers in europe are gone.

Or should the only outcome of the law be that the police could confiscate phones from kids? punish parents for allowing social media? Laws are not useless, at least teachers and parents will have a clear call to action. But still