I don't think debazel was saying that children should have been banned from owning computers for the benefit of the children. He was saying that children should have been banned from owning computers so that the government would have no excuse to regulate what's allowed on computers.
Well, it didn't work for alcohol and tobacco: in addition to being banned for children in many jurisdictions they are still heavily regulated.
so we agree that governments only using the safety of children as pretext to extend their control of people's lives, otherwise there are better solution protect children of the harms of the internet.