I am absolutely sure it is an allegory…especially from Blomkamp. District 9, Elysium, Chappie, and now this…what could the common thread be? Hmmmm…tricky.
So I understand the why’s and heretofore’s here, its just a bit tiring.
I just see evolution as something normally logical. I do not believe intergalactic space faring aliens would be like is often represented in this kind of sci-fi. As D’Argo stated in Farscape, “I am one luxan warrior with one eradicator ship, I could decimate your planet from orbit and there is nothing anyone could do to stop me” We’d be toasted by the Sheliak like in the episode of Star Trek: TNG - The Ensigns of Command.