Simple, if I hunt from the ground and do it the correct way ( wind, cover, camo, quiet,etc. ) I don't have to wait for things to happen, I make them happen. You'll be so surprised at how close you can get to deer. You think your getting an adrenaline rush from a tree, wait until you spot a big buck with your binoculars through the woods, plan your attack, and start your stalk, you keep getting closer and closer, expecting to be busted any second, but your not ! and you keep the stalk going, ever closer until, you only need him to step one way or the other, or for him to look away, or drop his head so you can take another step or two, to get the shot and then, bam !, either the arrows gone or you just got BUSTED !
You think its over ?, but wait he's not snorting or stomping his feet, the wind is still in your face and he's not really looking at you, something else startled him, and now you let things calm down you check to see what he might be planning and, now you get to start all over again.
That's one reason.