[Sebb767]

They can also threaten to cut off your finger, in which case you'd probably want to enter the password anyway. Also, your password can easily be found by looking over your shoulder or by you unlocking your device in front of a camera - which is quite likely, given how often you unlock your phone. You can also collect and fake a fingerprint, but it's a lot more effort.

On the other hand, in a few countries police can force you to use biometric authentication, but not to release your passwords. In the end, you really need to think about your threat scenario and act accordingly.