The vast majority of the British public absolutely love to ban things. If you listen to talk radio or daytime tv most of the time they’ll be having a discussion on banning something. We have a nanny state and the public like it that way.
Personally I use an allow list for my kids internet access and don’t rely on the state to parent them. I guess that’s too much bother for most people.
I do the same but let's not pretend that's within the technical ability of the average parent. Of course, it should be and that would be a far better place for the government to direct its efforts.