Wow, I did not know that about hunters and WWF. I did know about hunters also being conservationists for many, many decades. Teddy Roosevelt was one and he founded the National Park Service here. I'm not a fan of hunting, but. . . . and certainly not of endangered animals, but . . . I do see a point of hunters also being conservationists. I have probably 30 relatives in Alaska and they all hunt and fish. They are also very gun safety conscious and when Columbine happened, the younger ones were like, "Why would anyone take a gun to school? You only want it out in the woods." They were confused because every kid in that school was familiar with firearms in a hunting scenario and no one would think about bringing one to school. But this was the 90s and it's Alaska, so who knows now? In summer, no one goes salmon fishing without a gun around there. To my knowledge, no cousin ever shot a bear or needed to.
I suspect hunters can make such good conservationists because they see firsthand how wildlife live and interact. They see what over-hunting can do firsthand, and they can also see when and how population control may be useful as well. It's also a fact that various animal populations do ebb and flow and it's not always possible to tell what's the natural or best balance. One of my college roommates was an entomology major, and she talked about how various bug populations would balance each other. One year something would explode ("It's a bad year for mosquitos") and then a predator population would balloon in response to the greater food supply. It's fascinating.