Well if I see a group of people as people, I don't say they're inherently incapable of making their own decisions and should be controlled. Before anything else, the way you're talking about children is incredibly offensive, and it's nuts how normalised it is to talk about children in this way to the point where people do it in supposedly radical spaces. It's obvious how reactionaries use this rhetoric, e.g. it underpins a massive part of the current anti-trans panic (and was the canary in the coal mine so to speak—western mainstream press fearmongered about trans kids first).
And like I said initially, kids will get around parental blocks anyway. Because despite what you think, kids are not stupid. They can problem solve. So are you going to just slightly inconvenience your child and have them end up on the websites you don't want them on anyway without any real attention to the issues at hand, or are you, as a human with more experience than them, going to lend them some of that experience and teach them the skills they need to keep themselves safe online?