I think hunters should eat everything they kill. Or use the carcass in some other funtional way, such as using the skin or fur. Killing an animal just for sport is so wasteful.
From the perspective of a vulture or an scavenger for that matter, specially one with chicks or cubs to raise, it’s not wasteful at all, it is like winning the lottery, or being blessed with manna from heaven. While I have the same aversion to “wasting” a kill, taught to me in childhood by my elders, I have to admit from my observations of turkey and black vultures here in Florida that no carcass or gutpile ever goes to waste and the very idea of it being wasteful to lave a carcass is just an emotional and cultural judgment, and not based in truth.
We can truthfully say it is unethical to kill an animal and leave the carcass, but we cannot truthfully describe it as wasteful.