> Good parents can raise their children correctly even with $bad_stuff present around them, that was the point I was trying to make.
I concur. But the internet exposure of kids is mostly not governed by parents. They either are alone with the connected device in their rooms, away from them, or with a mobile device out of their home. The best the parents can do is to educate the kids, but the public lacks the knowledge to effectively do so. They should be given the formation to be able to educate their children, and furthermore schools should educate minors on the use of tech.
"putting your kid in a room full of $bad_stuff" will mostly lead to addiction if the parent is not there to teach the kid: this is harmful to you; not you think?