Obviously, there's a risk of your biometric information being stolen or spoofed. However, if combined with a government-issued ID, this could make it nearly impossible for AI to acquire and resell your intellectual property.
If someone wants to do something interesting with protocols, how about making a zero-knowledge [1] protocol wherein the person sending a packet can't see who requested it, nodes which forward it can't see the sender or receiver, and perhaps even the person who requested the packet doesn't know who sent it. Zcash [2] does something like this for tokens; I'd like something that is much more efficient (lower overhead) than Zcash's blockchain-based technique.
I should add that something like this sortof existed for businesses. They could buy Extended Validation certificates. Initially this required a public notary but that did not scale well at all. Eventually all the friction was removed and the only difference was you needed a Dun & Bradstreet number and to pay more for the cert. It sounds like you want something similar but on the client side which would be even harder to scale in my opinion.