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slender sure. The driver not wearing the seatbelt not being aboe to properly maintain control can also kill or seriusly hurt others in the car with them.That reasoning is pretty slender. By the time that someone has been thrown from behind the wheel the accident has already occurred. The use of brakes will have become moot.
A better line of reasoning would be to say, if you don't wear your seat belts it could adversely affect someone else because they will be very sad that you are dead. You might leave a minor child without a parent. Might leave your grandchildren without a grandpa.