Like I said, I don't know a lot about what goes on in Zimbabwe. If I had that kind of money, I might be interested in hunting an elephant (that needed hunting, for population management reasons/etc), but I wouldn't knowingly go after one at a mismanaged park where the population wasn't being properly maintained.
I don't doubt that they are among the smarter land animals on the planet, but to me they are still animals. Pigs, for example are a lot smarter than they're usually given credit for, probably far smarter than cows, but we hunt wild ones here as "varmints" (no bag limit or season/etc) due to their negative impact on the local ecology. Coyotes ditto, and they're pretty clever buggers.