My cat isn’t in a survival situation either and has options that don’t involve killing. Hell, when she does kill a rodent, she doesn’t even eat it.
Also: https://www.scientificamerican.com/article/veggie-cat-food/
> Unlike dogs and other omnivores, cats are true (so-called “obligate”) carnivores: They meet their nutritional needs by consuming other animals and have a higher protein requirement than many other mammals. Cats get certain key nutrients from meat—including taurine, arachidonic acid, vitamin A and vitamin B12—that can’t be sufficiently obtained from plant-based foods. Without a steady supply of these nutrients, cats can suffer from liver and heart problems, not to mention skin irritation and hearing loss.
Unlike cats, we can survive without meat.
I suppose I should have written a proper more detailed comment, I absolutely do believe that humans should hold ourselves to a higher standard and definitely shouldn’t be doing cruel things to living creatures because we do know better and can do better. But nature is still a pretty messed up place sometimes.
You can probably find some other animals in nature that kill for no apparent reason though. There is apparently a term for it: https://en.m.wikipedia.org/wiki/Surplus_killing (though the term confusingly conflates unnecessary killing with caching the excess for later)