I'm not sure what that even means. Can the Saints potentially hit on a QB? Sure. But, the real question is, is the draft pick more likely or not to be better than Carr? Personally, I think not. So, if the question is "who gives the Saints the best chance to win?" I think that's Carr.
If the choice is between being "only pretty good" or "likely not very good", call me crazy, but I'm gonna go with pretty good. How did the draft work for Denver, for example? Have they even had a winning season since Peyton retired? I would take Carr over that any day.
I guess the devil you don't know is always better than the one you do.