Every human is different in this world. The things we have gone through in our lives up to this very point in life has made us who we are. We pay for the sins of our forefathers and ancesters. Of course, none of them knew makeing factories, at the time, would end up destroying the world in such ways as it has.
Humans are very complex creatures. We have emotions, feelings, mental states of all types imaginable. As time develops, we learn more and more about ourselves and our surroundings.
Humans aren't like animals, because we all think differently and because of our much higher mental our emotions can take hold of ourselves. Thus, higher and more sincical emotions develop. Greed, anger, evil, hatred.
I think that because of everything i have stated above, i think we do deserve to live. Maybe, we entertain God in our own way. Maybe he enjoys watching us and seeing how we adapt into this world. (Don't bash me for saying God)