I don't get this...there are some positive aspects to the hunt, and yet if the hunter chooses to keep a trophy, a physical reminder of a pivotal moment in his life, there's something wrong with that? I've heard others state that they were against trophy hunting, and in almost every case they were totally unaware of what trophy hunting is. The only feature that distinguishes a trophy hunter is the fact that he is selective. He sets a minimum standard for the animal that he shoots, whether that be a minimum size, minimum age, specific ###, whatever. The animal's meat is still utilized. Nothing goes to waste...especially in Africa.
Since you seem to reduce everything to its bare dry core, wondering what "purpose" the hunt serves, consider this: wouldn't it be wasteful NOT to keep the horns, the skin, the skull, or whatever other trophy the species in question provides? You, or others, are eating the critter anyways. I shot a beautiful bear last fall...probably the finest trophy of my hunting life. We had some of him for dinner tonight. And now I can look up, see him in full life-size in the corner of my den, and re-live that hunt. Should I have left that pelt out on the tundra just because it seems to offend some people?
I didn't shoot that bear because the population needed to be controlled, although in many places it does need control. I didn't shoot him because I would starve without his meat although I do enjoy eating it. I didn't even shoot him for the trophy, to "stroke my ego", as much as you may think otherwise. I hunted to experience the hunt, and the killing of the bear was the natural and proper culmination to that experience. I passed several other bears up, because they were not what I was willing to shoot. Shooting him served no "purpose" other than allowing me to experience the hunt in its entirety, and did no harm to the bear as a species, to the environment as a whole, or to my karma. It allowed me to interact with nature in a way that a non-hunter never will.
At some point the armchair naturalists chime in with some drivel about "hunting with a camera" or some such nonsense. Fine...do that...I enjoy wildlife photography and do a fair bit. It gets me outside, I see animals in their natural habitat, and a well-executed photograph even provides a "trophy" of sorts...gee, sorry 'bout that. But to compare it to hunting? Please!!! Nature photography, bird-watching, etc. are, to hunting, what watching a football game on TV is to playing football...a pale imitation of the real thing.
Have a nice day...however vapid and soulless it may be for you.
John