One was killed while on another vehicle... the other was killed by yet unidentified hit and run driver that was likely impaired at a speed great enough it launched her body more than ten feet into a field, to be found days after the fact and needing to be identified by dental records, almost certainly ending her life at the second of impact with the vehicle and if not she would have died from the impact with the ground.

Cars versus people not in another car, often result in death regardless of any little piece of plastic or rubber you put on a car. Plastic and rubber added makes the driver feel better, it does little to protect people.