I agree that the main reason for them is to prevent breaking your neck in an accident. But I have to ask… Why not make something that allows for both? Surely we can make something that helps ease our neck and shoulder muscles for long drives and prevent us from snapping our necks in a car accident from in front or back of us. No?
Those exist in fancier cars. Recently rented a jaguar f-type for a weekend getaway road trip and we noticed after an hour or 2 that the headrests actually were functional and comfy. Why the hell that shape isnt used in a normal seat i have no idea.
Idk I think because of how much force needs to be contained by the restraint it is rigid for a reason. My guess is there is an engineering reason based on physics.
Also you don’t want people to be falling asleep while driving (anymore than already happens) so maybe that’s a factor too? Like it’s not meant to be a pillow lol