I get that; don't hunt myself, but I have no issue with anyone that hunts for food and eats their kill. Our ancestors did it and I see little difference between that and processing chickens or beef to put on supermarket shelves or one animal preying on and eating another.
If you're doing it for kicks, love the kill and just want a head to mount then you don't get any respect from me.
Our ancestors hunted and people in poor and rural areas hunt because it was/is necessary for them to sustain their well-being, just like for some animals that have no other options.
With the perfectly good alternatives that we have the truth is there’s no need to hunt and kill those animals for food. It will unnecessarily eliminate the capacity for well-being in the future of the animals living in nature as free agents just like killing them for sport.
You hit on something big there - an awful lot of hunters are actually conservationists... and those that aren't, a lot of them are still environmentally aware, and at least make sure they aren't part of the problem.
I haven't hunted, but I do want to get into it eventually for a lot of the reasons you mentioned.
It's not as easy as it sounds unless you're really lucky, really skilled or doing something illegal/unethical.
I like the taste of some game meat, so I hunt. It's meat that I know where it came from, hasn't been injected with hormones to make it grow. I know how it was killed/butchered. Who really knows what you're really getting from the grocery store.
I'm never out there drinking/drunk, I only hunt animals I would eat and have the right licence and tags for. Plus I'll only shoot if I know I can get a quick, humane kill, otherwise I'm just enjoying watching that animal. In fact I shoot way more wildlife with a camera than with a gun.
Actually most serious hunters (not poachers or idiots whom I've met plenty of, unfortunately) actually do a lot to help preserve wildlife and their habitat. Duck hunting groups have been instrumental with rebuilding wetlands that have been destroyed which not only affects ducks but tons of other wildlife.
An action like hunting doesn’t become humane even when there is an option that could be considered even less humane, such as the animal agriculture industry. The animal lives a better quality of life, and the method of killing may be less inhumane, but they don’t remove the fact that the animal will still have interests in avoiding pain and suffering, and in continued existence.
Just like the act of killing wouldn't become justifiable even if one would do another thing that could possibly have positive impacts on others. And why not try to have the positive impact and remove the killing part? And if we were sincere in wanting to solve these problems out of genuine concern for the animal populations themselves surely we'd be finding other solutions (like for example with overpopulation problem things like capture, sterilize and release) before just shooting them. Or better we'd work toward restoring a balance that doesn't need our intervention. Now the whole preserving/conserving things is it’s just to ensure future hunting opportunities.
And when hearing these preserving/conserving arguments for hunting from people who in addition also unnecessarily in some form supports animal agriculture, and the excessively large issues it creates for the natural ecological balance (while being leading cause of species extinction) it’s even less easy to view it as a sincere argument.
edit. not specifically talking about the whole african hunting thing that has been discussed about