Success is a lousy teacher. It seduces smart people into thinking they can't lose. — Bill Gates. American businessman and philanthropist (born 1955) Success
I don't think there's anything unique about human intellience. All the nuerons in the brain that make up perceptions and emotions operate in a binary fashion.
Just in terms of allocation of time resources, religion is not very efficient. There's a lot more I could be doing on a Sunday morning.