Yes, elephants do destroy crops. And destroy most normal barriers to keep critters OUT of crops. And it's the tusks rather than the teeth. That's usually a poacher issue. Which guess, hunting funds a lot of the anti-poaching efforts. Poachers do not generally get permits and restrict themselves to a specific criteria listed on the permit, which is driven by conservation goals.
When it comes to hunting semi-endangered animals legally, like the Rhino, it's usually a 'directed hunt' that amounts to selling the execution of a now undesirable member of the population. And the PETA types STILL OBJECT.
Seriously. Straight up situation that happened: Black Rhino, effectively the 'head of the herd', gets too old to impregnate the females, but he's still around, and
grumpier than ever. Remember, the default state of Rhinos is pretty much grumpy to begin with. He's attacking the females and calves. He is thus no longer an asset to the herd. At least Cecil was still protecting his cubs and such.
So they go to auction off the right to 'hunt' him. I put hunt in quotes because, let's face it, the game guides know where he is, what he looks like, etc... They're looking at clearing something crazy like half a million.
Meanwhile the PETA types are like 'Can't they put him in a fenced area of his own?' I'm like "But he's a
wild animal! He hasn't seen a fence in his life, and he'd want to be with his herd anyways! He might be a Rhino, and they're definitely more independent than most cattle, but they still tend to form small associations.
Besides, that half million is like 5 years of operating budget for the preserve! With it they can afford to hire more rangers to protect the rest of the herd, as well as showing that said animals have value - it's when hunting and ranching of these animals is completely banned that they
go extinct. Offer sustainable amounts of hunting and you see what happens with Cecil's preserve. They get overpopulated to the point that you need to keep hunting them! At approximately $50k/head, each lion pays for a couple rangers.