Not that they're always successful, but hunters also want animals killed as quickly as possible (not necessarily painlessly, but are our methods of slaughtering really that painless? Do we give them a nice general anesthetic before bashing in their brains or decapitating them?). Anything but a good clean shot is considered, depending on the hunter, cruel, wasteful, poor form, etc. Most of the people I know who hunt aren't sports hunters. They hunt deer (because there's an abundance in the area, more than were here before the US was founded), primarily for food. A couple decent-sized deer, properly butchered, will last quite a while for them. If they hunt anything beyond what they need, it's to give to family/friends who won't or can't hunt.