Guess I'm missing something. Hunting over bait is not necessary and people can still hunt without it. So, a special license is required.
Hunting deer from a treestand is not necessary and people can still hunt from the ground. Should a license be required?
Hunting deer with a scoped rifle is not necessary and people can still hunt with a shotgun. Should a license be required?

And by the way, unless it has changed rrecently, no money from the sales of treestands or scopes goes to the Pitman-Robertson Fund. So, those 2 items aren't pulling their own weight and need to be gone from the deer woods.