State lands (parks, forests, natl forests, whatever) can not sustain a healthy population of wildlife alone. There just isnt enough land that is owned by the state and government that would allow a healthy population of wildlife to be hunted by the public.
It comes down to private land owners and the management practices they have on their own land that help populations of wildlife to flourish.
For instance, the 138 acres of land that I live on and manage, hold more populations of wildlife than if it were a paved parking lot. Without the land, which isn't owned by the state or federal government, that I live on and the farmers next to me, and the farmers next to them, there wouldn't be wildlife.
By the state denying us the right to hunt on Sundays, they are punishing private land owners.
So, without private land owners, there wouldn't be wildlife.