Canned hunts are not hunting. Ugh. Herd animals can indeed be difficult to hunt, but animals in a high-wall "hunting ranch" are not.
It gives a bad name to hunting overall, which has a myriad of environmental benefits both direct and indirect. I'm too tired to write my whole schpeel right now, but I hunt because I am an environmentalist. I backpack into designated wilderness area and pack my meat out, as is legally required and the reason I hunt. Anyone who thinks real hunting isn't difficult is kidding themselves to the extreme. That said, I'm a westerner, and what hunting does for the land/animals and how it's done is incredibly different from eastern-style hunting, where there's much less big public wilderness.