When driving the car wouldn’t be deadlocked.
After the accident it may well not be driving.
On mine the Safelock is only operated by the remote. The car doesn’t lock or unlock when driving.
Pretty sure that where cars lock when driving it is old fashioned locking and in an accident it unlocks.
The feature where the locks don’t work is only when the car is locked when stationary. The person locking it must remember the feature and not lock the car if people or pets are inside.