I'm talking about both parents and schools: the technical solution exists. If parents/schools don't want to implement it, that's on them.

This answers your objection A and B. C is also a non-probem with a trivial fix, as I showed.

What we're discussing is whether age verification is needed. Based on the existence of other, perfectly fine solutions, it's not. "But schools don't bother implementing those other solutions" is not a counter-argument to this discussion.

> If parents/schools don't want to implement it, that's on them

Well that's not much of a solution is it now? More like an attempt that we all can see will fail.

Harm reduction is not the same as a solution.