Funny, I thought we are apex predators. Why do you want to kill all humans? /s

seriously though, ecosystems are interdependent and predators have their place. I remember watching a documentary about white wolves on a remote isolated island keeping the local population of yaks and rabbits from eating the island clean. They are absolutely vital for that particular ecology. Similarly it is not our place to rank animals by importance, since we are as a species quite obviously imbeciles.