It’s called a fail safe the clue is in the name. The failure mode of a mechanism is it’s safe mode.
In cars with mechanical locks they require power to be in the locked position in the unlocked position a solenoid loses power and a mechanical spring pulls it into the unlocked position. So when it fails and loses power the default is to unlock. Sure the mechanism could become damaged and bent out of shape but we’re talking about a sliding bolt here, something that can be manipulated with a mechanical lever like a key.
It’s called a fail safe the clue is in the name. The failure mode of a mechanism is it’s safe mode.
In cars with mechanical locks they require power to be in the locked position in the unlocked position a solenoid loses power and a mechanical spring pulls it into the unlocked position. So when it fails and loses power the default is to unlock. Sure the mechanism could become damaged and bent out of shape but we’re talking about a sliding bolt here, something that can be manipulated with a mechanical lever like a key.