This makes me think of the misconceptions that we have about the Nature.
Just one example:
"Animals do not fight each other, they kill only to survive, to feed themselves".
Sure! Just a few days ago I saw a documentary in which two walruses were eating each other for issues of "women"
(among other things, in the world of walruses there is the concept of Harem - and probably also in other species).
In the animal world there are murderers, traitors, thieves, "homosexuals" (animalsexuals
), bigamous, etc.
After all, we are animals (+ an alien).