To be clear, I’m not advocating for online age verification. I’m very much against it in any form. I’m just curious from a technical standpoint if it’s possible somehow to construct an accurate age verification system that doesn’t compromise a user’s privacy? i.e., it doesn’t expose the person’s identity to anyone nor leaves behind a paper trail that can be traced to that person?
So, you have fully backed my response. OP didn’t ask if it was possible with some caveats. I understand a (at a high level) the technical options that can get close to what OP asked for, but it fundamentally just isn’t possible without caveats.