Because we don't hunt enough.This is a debate forum. If you are going to assert that I'm ignorant of something then I would expect you to provide evidence that supports said assertion. For example, please support your contention that there is no other way to stop the pig's "destruction" besides killing them. What would happen if they weren't killed?
Yes, it talks about what I was already aware of actually. Like many state wildlife agencies their primary focus is on maintaining wildlife as a "renewable resource" for economic and aesthetic purposes. One thing that might certainly help this problem is if said agencies stopped artificially boosting wildlife populations so that a profit can be made off of selling hunting licenses as well as the hunter's passion for the "sport". If hunters only hunted to keep the population down then there would no reason to raise said populations in the first place. Of course, then again, hunters want to keep killing other animals for generations to come, and so their numbers must be "maintained" at a reasonable level in order for this to continue.
Here's a question: If hunting is the "solution" to the overpopulation of species then why are we still having problems?