Why do intelligent and successful people accept kindergarten level spirituality, as taught by religions, ?

"For the scientist who has lived his dream by faith in the power of reason, the story ends like a bad dream. He has scaled the mountains of ignorance; he is about to conquer the highest peak; as he pulls himself over the final rock, he is greeted by a band of theologians who have been sitting there for centuries." - Robert Jastrow (astronomer and physicist)