The wives of hunters ask this question, and so do cat owners. In olden days, men had to hunt to survive, ditto for cats. It’s a “guy thing,” and a “cat thing,” too. Your cat may be sleek and well fed, but let a bird or rodent come within sight and the predaceous genes take over.
Sometimes the hunt can be more involved than that, with a cat waiting by a small hole for hours for the desired prey to come out. A lot of waiting, a lot of stalking, then a few seconds of pursuing and killing. Perhaps men who truly enjoy hunting have a better understanding of the cat as predator than others do.