A thief flags you down, grabs your phone and makes you unlock it using your thumb.
A cop opens the cop car door, grabs your hand and unlocks your phone, or even easier, face unlock.
Granted, guns and torture are rather effective as well, but is anyone entirely against fingerprint unlocking?
OP specifically used cop unlocking your phone as an example. Don’t argue in bad faith.
Absolutely no access control on a consumer device is impervious to guns and torture.
They also specifically used the example of guns and torture.