Well, you do not have to shoot from a rest. I've hunted with 14" and 15" Contenders for decades and while it is always best to use a convenient rest in the field - log, tree, rock, bakcpack - it is certainly possible to shoot well offhand with practice. I used to shoot a lot of metallic silhouette competition, and got pretty good offhand with the long barrel. Some hunters have more trouble than others, but I found sticking a bulky "rest" on a handgun turned it into a very unhandy firearm. I'd rather use a rifle in that case, but that's just me.
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