Pareidolia is a "feature" not a "bug", in the sense that it is a hard-wired evolved part of our visual system. I believe the consensus understanding is that is a predator-avoidance system. Better to run away from something that looks like a pair of eyes in the bushes than be eaten by a lion. We therefore pick out things that look like faces (human or animal) and interpret them as those first, before we have had a better look.
Biting the hand that feeds IT
