When we think of aliens of higher life, most of the time we think of ET, or encounters of the third kind rather than something like (for example) Independence Day or War Of The Worlds in which the aliens are like a set of Locus wiping out planets for resources.
The universe is a massive, massive place with us not even being a grain of sand on the side of a beach.
Do you think the alien life that exists are more likely to be intelligent, sociable and friendly or a bunch of bastards who would just view us as a piece of shit?
Imagine if the Nazi's won the war and the future we are in now, was them and not the allies with warped value. That shit could happen on other planets, yes?