Air traffic control knows it was a plane but it was a funny angle so the conspiracy theorist can't tell. Therefore UFO.
I know that the Egyptians used a flood pond to make a water level to make the Pyramids so level. The conspiracy theorist doesn't know about water levels. Therefore Ancient Aliens.
They start with a thing they don't understand then make up a grandiose explanation.
It's easier to explain an eclipse with "a witch did it" than to explain the motion of the planets. But first you have to ignore all the heavy lifting that "a witch did it" is doing. How? By what mechanism? Why?