[NorthMountain]

I doubt the poachers do that

No, they don't. That's the problem. The herds aren't managed, the resources aren't used properly (or at all), and only a bunch of total scumbags benefit.

A legal (client) hunter goes out with a tracker, guide, professional hunter to track down a particular animal that the professionals have selected for improvement of the herd, and to kill that particular animal. They end up using all the usable parts of the beast.

Poachers kill as many animals as they can, with no thought to the benefit of the herd, and leave the meat to rot. They're scumbags.

[zeugma]

Not only that, but elephants and rhinos are really big pests in the areas where they live. Elephants can be incredibly destructive to everything from trees to crops. You wouldn't really want to live in an area where there are wild elephants.