My take is that being alien, their thought processes might be diametrically opposed to ours. Example: they enslave us all, but we only have to work 3 minutes a day, pulling weeds. In return, they provide us with unlimited energy and food.
Example 2: they threaten to destroy us, unless we all shave our heads and shout "KAHLOO-KALAH!" at the sun each day at noon.
We simply don't know. Some say octopuses are aliens. Others say tardigrades are.
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