Earlier quoted context omitted.
I don't get why anyone would want that. At no time in the two decades I've been driving a car, I've never, ever, ever thought to myself "This seatbelt is annoying, I wish I didn't have to use it." I don't even recall ever thinking that as a child passenger.
There are 2 reasons - Health issues - trouble breathing. - getting stuck in the car that's on fire, drowning etc. (yes I know you are better of with the seatbelt)
Someone I know has a brother who was in an accident, was wearing seat belt, was stuck in the car as he couldn't release the belt, and was burned somewhat. He simply couldn't buckle up after that and eventually got some kind of exemption for medical reasons.