I have a 29.5" draw and shoot 80 lbs because I want to. I'm in my late 20's, strong, in shape and can pull and hold 80lbs like most people can 60-70lbs. So why not? The extra poundage can't hurt and actually can only help.
Kind of like the guys that drive an F350 on 37" tires to the grocery store. It's not necessary to carry a gallon of milk, so why do it? Because they want to and can.