Well, getting hit in the heart with anything tends to be generally deadly, but also would be a freak occurrence - which getting killed by a rooster isn’t so much, apparently. The wounds made by the blades in question are nasty enough to kill after being hit in a variety of bodily locations. I just imagined the wounds would be shallow enough to allow the victim to live long enough to get medical attention, but apparently not.
Oh, I’ve seen it, too. I’ve watched my chickens hunt and kill mice, and seen the scars a (regular, unarmed) rooster left on my uncle. It’s just that a rooster doesn’t have the strength or the leverage provided by a human arm, and humans aren’t as successful at stabbing each other to death as you might think. I’m not at all surprised that people get seriously injured - and that must be much, much more common than people actually dying. I suspect I’m not underestimating the force so much as how often the rooster is managing to get solid hits in.
There’s the occasional, semi-serious, proposal to genetically engineer “dinosaur” chickens (with teeth and claws, and people laugh at me when I suggest this would not be cute but actually somewhat dangerous to human beings, but…
*E.g.
