It's why motorbikes don't have a seatbelt. Except the ones with a roof, which do.
It's entirely possible that when a vehicle doesn't have a roof, it's better to be thrown out (while wearing a helmet and other safety gear, obviously) than to be strapped in a seatbelt.
It's entirely possible that when a vehicle doesn't have a roof, it's better to be thrown out (while wearing a helmet and other safety gear, obviously) than to be strapped in a seatbelt.