Baiting unnaturally brings deer together and (presumably) closer to the hunter. A scope does not do that. A scope just makes the hunter a more efficient killer at longer distances. Plus a scope can make the difference between a quick, humane kill or a slow death or only wounding an animal. Scopes may also be used to determine if a buck is legal as far as point restrictions go. You cannot compare the use of a scope to the use of bait.
Hunting: 10% skill and 90% location.