These platforms are heavy censored with a direct line to governments. This will push kids to other platforms with less censorship. That's a major benefit.

As we go down this road platforms will need to be banned for everyone. For example VK wasn't on the list and they won't implement age checks. They and many other sites will need to be banned until you are left with a white list of acceptance sites. Add in age verification on those sites for everyone.

Kids will learn how to overcome the ban. VPNs will become the standard.