When humans encroach upon the home grounds of animals that's what happens. It's not so much hunting anymore that leads to animal extinction but human encroachment into habitat. You can't build cities or even villages, you can't clear farmland, you can't mine or lumber, you can't fish, you can't do anything without affecting animal habitat.

What parents are going to say, "I'm not going to clear that piece of land; better to leave it as it is than to build a house for my family"? And there are far too many people.

But I suspect that in one way or another Nature will correct to situation. As I've said before, the planet will survive, but there is no requirement for humanity to do so.