Yes, cats hunt. They kill. They do risky things. I'm surprised the researchers are surprised at the types and frequency of behaviors they discovered.
We have a cat that's a prolific hunter. He was a stray living a semi-feral life when he roamed our way and stayed. A couple years ago, neighbors complimented his behavior. It seems he frequently patrolled near their house, and had a reputation as a rat catcher. You can tell by the way he walks and the look in his eye, he deems his role an important one.
The other morning, he slipped a whole bird past me when I let him in. He dropped it in the kitchen, and moved back to assess how the indoor-only cats would react to the strange arrival. The kitties seemed more confused than amused. After about 30 seconds of watching the assessment team, our hunter gave me a look that signaled, "Okay, that's enough. You can pick it up up now."
After a breakfast bowl of Iams, the hunter was asking to go out again. There's a lot of turf to roam, and there's only so many waking hours in a cat's day.