Yes all those things are great, but you'll notice that instead of explaining this to the non-technical crowd, technology focused privacy concerned individuals rarely attempt to educate about how these could work. Instead they simply seem to be against any sort of control on what children watch online.

Given that it's also coming from a bunch of tech males, it comes across as extraordinarily creepy. This is not hard to understand.

If I believed that the efforts in question were in earnest, I would absolutely be talking through the finer points of how to do it right. I don't believe that, though. The veneer of legitimacy here is paper thin - we start with a very weatherbeaten conservative war drum (think of the children!) and immediately jump into "let's ruin privacy for everyone and I totally promise this isn't another Cambridge Analytica".