There are many reasons to believe that predator/prey dynamics will never be turned into lovey-dovey halcyon days. Something in nature underelies the drive and instinct to prey on the weak--it's not a human issue. Its also prevalent in cannabalistic primates, and more obviously in every (true) carnivore. The cat playing with the mouse, the great white shark tossing a seal, the aligator and the serpent. There are many deeper relationships that are not simple "mis-understandings"--the food chain doesn't work that way. The architecture of Nature's species--nutrition and health-- is logically at odds with the entire scenario. Would the parasite and the host ever have a "healthy" relationship?
It's true that only autotrophs have the luxury of a guilt-free existence.
But if and when our deeper existential problems have been solved, we can imagine constructing robotic simulacra to give those predators satisfying prey to chase.
A deeper quandary might end up being: once we have done it for ourselves, are we obliged to cure death for other creatures, too?
