Can you explain how secure enclave and unique user identification works? It does not compare your fingerprint with a central server, nor does it care who you are. Your fingerprint is the input for your private key, like your password is...is your bitcoin password public? You swap one string of information against another. It does not matter if who user the names of your family members or if you user your biometrics. As long as another person doesnt own your face, NOBODY can lock in. But anyway its not about the log in. Its about preventing abuse with multiple accounts. You can still have 1000 accounts for trolling or what ever reason but what you cant is bullshiting us, selfvoting with hundret different accounts and raping the reward pool is not possible.

your online identity (which still is "anonymous") is the sum of the interactions (YOUR interactions) with devices and the sum of interactions with other users. This is what makes you human and not a silly bot.