I might get downvoted for saying this but I’m pretty sure that a lot of the time not wearing a seat belt is safer than wearing one. If you don’t wear one that means your body is more “free” to move where it wants upon impact whereas a seatbelts can lock you in place and likely lead to whiplash or serious muscular injuries, sure the injuries from not wearing one will be bad too but I feel that your body being “loose” upon impact would be far more beneficial. That’s just my 2 cents on the matter anyways.