Or idiots.
idk where this is coming from, it's incredibly common and plenty of the most intelligent people I know have irrational fears. I have the same kind of thing as well, though I do not profess to be smart. It's never a real fear of the dark, it's fear of incomplete knowledge. You have no idea what is in the dark and therefore you are afraid. Makes sense, basic survival instinct, etc. etc. etc.
/rant