Here's a thought: those first two people who saw Superman and thought he was a bird and a plane - what were they so excited about? Had they never seen those things before?
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'