Most European brands I've tried only lock the cars when the speed exceeds 20 km/h.
In addition, most brands I'm aware of will unlock the car when the airbags are deployed (Kia/Hyundai, Renault, Volkswagen, Mercedes, BMW). Because these cars still have door handles, they can be opened by a bystander after a crash.
The issue is not that the doors are locked. The issue is that unlocked doors without door handles are still useless.
In addition, most brands I'm aware of will unlock the car when the airbags are deployed (Kia/Hyundai, Renault, Volkswagen, Mercedes, BMW). Because these cars still have door handles, they can be opened by a bystander after a crash.
The issue is not that the doors are locked. The issue is that unlocked doors without door handles are still useless.