It's not zero knowledge for me then. Also - if there is ANY possibility to track anyone. And/or centrally mark someone "nonverified" then it makes more problems than solves.
Even if I trust my govt (no way), even if it'd be fully ZK with no way to track anyone… still govt would have a way to just block some individual "because".
And the best part… Age verification will not solve "children problem". I think it's parents problem to take care of their children, AV will be pretty easy to bypass - kid will just borrow ID for a moment and… voila! Govts (or some people) are creating problem and solution that do not exists.
I do not like way internet went, I do not like more way it's headed now.