It is not. In a true, humane cull, such things as poisoned darts would be used. The targets would be adults, breeding-aged females mostly, and older males. The temptation to make a quick buck would be removed by strict regulation and policing of the process.
Not here. Here we have a situation where there is money to be made. So, we kill infants (better coats!) with a club so as not to ruin the hides. Oh, and if it's not dead, well, skin it anyway! Forget the adults. They make up some Bravo Sierra about protecting the fishing stocks (from their NATURAL predators, LOL!) that they themselves have depleted to provide a thin cover. The whole enterprise is sleazy beyond belief.
it's no better, really, than when the Zimbabwean government claimed it needed to "cull" elephants...which it did with machine guns and then hacked out the tusks, which were sold for ivory, gaining big $$$. They killed entire family units and left most of them to rot.
And votes to be secured, as well as the provincial and national treasury to be enriched on taxes collected from the clubbers.