If you reflect on the deities of ancient civilizations, or just on the reality of evolving as a diurnal primate with acute vision while living on a continent replete with leopards, you might change your opinion somewhat.

People do not focus more on lights, to illuminate, than curtains, to make things dark, because they are racists.

Of course there can be cultural additions (Barbie is not a sun god, and "ghosts" are often white even in cultures where everyone is dark-skinned (how else would you see the ghosts at night?)), but the basic light=good / dark = evil dichotomy has broad precedent far before any example you give.