This is true but it also has the best personality traits.. kindness, love, forgiveness, altruism and so on and so forth. Different sides of the same coin
The hard cold truth is, there is no so called "cycle of life", life on earth will still be extinct without the influence of human. In fact our intelligence and will to survive gave life on earth a chance to survive. As for personality traits, well, I would say human is interesting, a world without human is boring as hell.