If your daughter has a child she is older than the current generation where social media is everything, and it was probably easier to monitor her internet access. Even better if she was your only one.
While I agree on the point about parents parenting generally, it's easier said than done. If they are at home you can check up on them, although looking over their shoulder the whole time is impossible. And do you prevent a 13-year old having a smart phone when "everyone has one" and all phones are smart anyway? Do you police their internet access when out with friends?
It has to rely on education and trust, but kids make mistakes, follow the wrong crowd, etc.
Having said that, this new proposal is just silly. I think they must believe that there is some body somewhere who can control what is "on the internet".