Intelligence is difficult to define. Elephants live very long and this can lead to developing some behavioral patterns.
I still remain of the opinion that something should be tried to regulate the population by hunting. The disturbances and stress in some elephants caused by individual shots in a herd may have to be accepted at the beginning. Who knows if over time everything may allude and the population adapts to a constant hunting pressure. No one has tried it yet. It would be worth a try , especially due to the ongoing conflict between elephants and human people in some countries , without a solution being proposed.
We as hunters are fortunate that trophy elephant - older males - are not often found in large family herds. They tend to join these herds for mating and then leave, often in the company of other, usually younger, males. Taking a bull out of such groups, which do not seem to have the same social structures as female led herds, may impact the other elephants, but they are generally already mature and fewer in number.