All electric cars are registered in a Crash Recovery System (CRS), not only the electric specifications but also instructions, on how to handle in case of an accident. Because of risk of electrocution, depending on how big the car is damaged, saving people inside of the cars can take a long time. Much longer then in conventional cars. Instructions tell what to do in case of fire, where to cut and more importantly where NOT to cut the body of the car...
I know of an accident with a Tesla where the driver could not quickly be cut out of the car as the car was in fire and the procedures had to be followed, which was very time consuming. As the driver was already dead the pressure was not so high, but imagine people burning alive in the car as they cannot quickly be saved due to procedures and risk for firemen and medics to be electrocuted. These problems don't exist with conventional cars.
I know of an accident with a Tesla where the driver could not quickly be cut out of the car as the car was in fire and the procedures had to be followed, which was very time consuming. As the driver was already dead the pressure was not so high, but imagine people burning alive in the car as they cannot quickly be saved due to procedures and risk for firemen and medics to be electrocuted. These problems don't exist with conventional cars.