The only secure thing is a thing that only you know and only you can verify even if you are freely observed.

That is, shared secrets between you and your trusted device (meaning passwords) are the singular thing that provide authentication securely. Your password cannot be extracted from your head (yet).

That being said, if your risks are mundane then the benefits of biometric authentication far outweigh constant password input, not to mention that constantly entering your password exposes you to other side-channel attacks.

Biometrics for simple access, passwords for changes, modifies and access to sensitive information.