Things have to be more complicated when there are lots of hunters and not enough game.
Not necessarily so. It's more about revenue than scientific management. 
I don't see how you can say it's not so. Less area to hunt along with less animals, AND more people, can only result in more complicated regulations. I agree "scientific management" isn't a big part of our wildlife management system in this state, but nevertheless, the reality of having less on the supply side and more on the demand side, is the cause of more regulations. Let's call it "hunter management."
Dividing weapons into separate licenses does not achieve a solution to "less area...less animal...or more people." (If that is indeed a legitimate problem.)
It can be assumed that a hunter forced to use one type of weapon over another will hunt regardless. It can also be expected that he already has land to hunt on. Additionally, that particular hunter can only harvest his limit, so if said animal is killed with a bow, gun, or a club, it has no impact on the total number of animals.
That said I'm only here for another couple years so I don't have to worry too much in regards to the regulations.