I can't speak for other parents, but some standards for parental controls—the presence of which and adherence to might be enforced by law, if need be, and need probably would be since none of this is stuff vendors couldn't have figured out on their own long ago if they cared to—we could leverage would be goddamn nice and is all I'd really want.
Especially as devices get more locked-down and it becomes hard to control stuff at the network level if you don't have root on the devices themselves, like... man, it's such a time-suck, and I'm 100% sure I'd be having to choose between "I guess we just don't have the Internet in this house" and "fuck it, I give up, go stumble on gore videos I guess" if I weren't a lot better at this stuff than the median parent. I feel for them, this stuff is entirely hopeless for 'em.
Like, my kids have Chromebooks from school. They pretty much have to bring them home. So now I have this extra physical item I can't administrate that I must police at night if I don't want them to stay up all night on trash-tier web games or something. So I'll block the devices at the network level at night, right? Easy fix! Nope, the fucking things rotate MAC addresses as an anti-tracking measure I guess. We have zero need for that feature (the number of times they're gonna use the things outside school and home over their whole school careers is going to be very small) but I'm not admin on those devices, so, stuck with it. So there's an extra hurdle to making that happen.
Repeat some other incredible frustration for every single thing. Oh look, AppleTV has a simple rating interface so I can at least make sure nothing too bad can get through if I mess something up. Great. Oh except almost nothing on the device except Apple's own software respects the setting, at all, just ignores it. You have to go dick around with every single service on there to lock them down, then hope it sticks through updates and other nonsense. Awesome, great feature that's actually totally useless because nobody cares about the users. Sigh.
Your options are go full-luddite, give up and leave them to the Internet gods, or take on this load of work and stress that our parents did not have.