If you are the parent you don’t need to block scarleteen, or go ask alice, or whatever sex ed website you’re thinking of.
And then kids need to go out of their way to ask their parents to unblock, which is embarrassing. Just stop trying to control what your kids do online. They're not your property.
Why can’t parental controls block a game?
I never said they couldn't. My point is that parental controls wouldn't block other players on a game who mean a child harm, unless you block the game as a whole. Plenty of people want their kids to be able to play video games but not to be scammed on them.