I have buddy's who have killed deer while smokin a cig and in their trucks. And yes you might get lucky and have the wind and cover all be right and kill the next world record.

But, anybody who has spent enough time observing pressured deer, knows that deer have a good sense of smell, sight, and hearing. To consistently kill mature bucks, you have to go to difficult lengths, that means watching your scent, blending with your terrain, and being quiet.