My argument is: it is possible to do privacy-preserving age verification, and that technology is already deployed (look at Privacy Pass). We should acknowledge that and stop claiming that the age verification issue is the same as the E2EE one, because it is NOT.

And then we could maybe have a constructive debate about whether or not we as a society want that technology. That would be more interesting than "if I keep yelling that it's fundamentally stupid, maybe people on the other side will start believing it".