Because humanity are animals, we can say whatever we want, we can say there's more to life than eat, sleep, produce wastes, mate, die (not neccesarily in that order, and not neccesarily seperately) but when it comes down to it, we love the hunt, we love watching a trapped fellow lifeform realize there is no hope, and then keep fighting, all because the kill is sweeter when we earn it, and watching that is nothing compared to taking the prey, but in todays society, we have suppressed base instinct as taboo so long, that doing these things is considered sick, but watching can be a way to enjoy it, and never let anyone know that we're loving every second of the beautiful carnage. And It's not the gore itself that is what we love, it's the fact that that is something losing its life, that it's being taken by force, that the predator wins, and gets the spoils, and the prey loses, and pays everything.