I can't think of any more boring way to spend a day than sitting up in a tree waiting for a deer. Never done it. Never will.
BUT
I am an enthusiastic consumer of animal products. If someone gets their jollies hunting animals that would get culled by someone, anyway, as lions do, then to each his own. Have fun with it if that's your hobby. He's probably guilty of participating in a little poaching of an animal he didn't have a right to hunt, as it was essentially public property. No more. Because there are plenty of nutcases in full blood lust mode over hunting in general, with calls for executions.