It doesn&#x27;t answer the question. Passwords can be revoked and you still don&#x27;t want to leave them everywhere. Need for revocability has nothing to do with maintaining the &quot;secret&quot; and everything to do with mitigating the impact of a compromise.<p>If a password is leaked, you need to revoke it in order to mitigate the potential damage. If a fingerprint is leaked, do you need to do the same? No, because the security of the fingerprint is not tied to its secrecy. Fingerprints are not secret. They are just hard to reproduce.<p>Trying to equate fingerprints to passwords or usernames will inevitably result in absurd comparisons because fingerprints are neither of these things. They are an entirely different type of entity.<p>Fun fact: fingerprint access to banking info on your phone constitutes two factor authentication. Factor one is the fingerprint (something you are). Factor two is the phone containing the already-authenticated app (something you have). Arguably this is a more secure way to access your bank than the typical one factor username+password you would use online.