Like many mention in other comments on this post, it's possible to implement using ZKPs. There are likely other methods that would be effective without compromising privacy. None of them are part of the Age Verification discussion because kids are not the actual point of Age Verification.
When I say "if we have to know you're not a kid, we have to know who you are" I'm not stating an actual truth, but the argument as it is playing out politically.
When I say "if we have to know you're not a kid, we have to know who you are" I'm not stating an actual truth, but the argument as it is playing out politically.