If it helps we have to cull deer in real life otherwise they'll kill lots of people on car accidents. Conservationism isn't inherently evil just a part of life. This is just a primitive version of that. You don't kill the monsters the village dies.
The evil part is using like a finger and a scale instead of the whole animal.
Maybe you can justify it by the money you get at the end of the mission but still.
Every game needs an option to auto loot and turn off loot animations. It gets annoying, and it's back tracking from the 90s when it was just a floating coin or medpack or whatever. I hate it. I'm positive it's implemented to waste time and up the hour count.