Why? Every time he's been put on the field in whatever capacity he's been asked, he's produced. Is it really so far of a stretch to think that someone with the offensive prowess of Payton would take advantage of using the kid in whatever spot he can help the team?
Obviously, he's got the athleticism and showed in college that he can make things happen with the ball in his hands. No one is suggesting that we make him the starting QB, just draw up a few plays here and there that could be used in certain situations.