UFOs are piloted by a previously unknown lifeform which has a controlled population residing in habitats beneath the oceans floors. This explains the huge eyes and lack of pigmentation. It also explains why they are seen at all since we reside on the same planet.
That a life form would journey across our galaxy or even from other galaxies to visit us for whatever purpose has been planted in your minds by government control of sci-fi books and movies, even going so far as to drop just enough government coverup news to peek the curiousity of the public. No one would imagine that life forms from other planets would visit us, an insignificant rock in an insignificant solar system, in an insignificant galaxy, if it weren't for the propaganda spread by sci-fi movies and novels.
The earth is pretty interesting to me because I live here but if I had the whole universe to visit? And why would alien life forms from wherever have human shapes?