So, if these aliens exist, we might conclude they they want something else from us other than merely our death.
Some people, by virtue of their religious faith, believe humans have value to a being (or beings) greater than humans. Perhaps humans have ransom value.
Or maybe we have slave value or certain of our body parts are considered delicacies to certain advanced species.
It is amazing how human thought with regard to aliens (who have yet to be encountered) seems limited by what we have seen or read about in historical science fiction.
Eating the Human Thymus Gland is supposed to be like Cocaine to The Reptilians.
We all contain a great gift. A piece of the creator or a gift from random mutation (which ever way your boat floats). It is in code form and not physical form. There is no scientific word for it. Religion calls it a soul. Information itself is special. Knowledge. Wisdom. DNA is the hardware. Imho. We just dont know how to see or measure the code yet. Or may not even have the capabilities. Once you grasp that or take that leap, it gets real crazy afterwards.