Because unlike your latest Call of Duty download, hunting doesn't consist of moving a mouse until the crosshairs are over the head. It's an entire process.
Yeah, bad anaolgy/false equivalency. Hunting requires several things, license, gun, ammo, tree stand, location scouting and the ability to sit on your ass for several hours at a time. Yeah, real strenuous "sport". It's not a sport, sorry. It's one of two things: a for-food necessity or a conservation act. To call it a sport is a joke. Hell, most people don't even hike to scout anymore, they use four wheelers, so again, where's the "sport" activity that would qualify hunting? I have been around hunting and hunters all my life. My uncles and cousins all hunt deer and turkey and a lot of my friends and acquaintances hunt. Most of them are athletic but hunting is not how they work out nor would they categorize hunting as a sport (see above). If you're not hunting for food then you are participating in a leisure activity or game--not a sport. That's why it's called "game hunting". Sport fishing is another one of those iffy classifications. I don't have to be in shape to fish either. Sports usually have a physical fitness requirement. Hunting, not so much. If you're breathing and can pull a trigger, you're good.