Because of most of all that was mentioned already.
Personally, I like it because it brings me close to the game. It's one thing to have a deer step out 150-200 yards away and drop it, it's quite another to have him/her come in so close you can see the whiskers. My heart starts pounding and I get tunnel vision when focused on a deer approaching my stand. I think it goes back to the primal, predator and prey thing.