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?
GrapheneOS allows it to not be used as the device unlock, but still use it for other apps once unlocked (such as banking apps).
Device unlock should never be biometric.
I also have data over the usb port disabled unless the device is actively unlocked.