And so it goes with the complex models that represent the weather, the evolution of the human race, or the moral and social codes that we live by. Sometimes, we don't want to know the simple truth, for fear it will unhinge our belief system. Go back to the early 17th Century, when Galileo Galilei invented the astronomical telescope and proposed that the theories of Copernicus, with the Sun at the centre of the Solar System, and the elegant simplicity of planets orbiting in simple near circles around it. I don't doubt that many people will pass this off as a load of hogwash either, for the disruption that it would cause their belief system. I did mention religion and that I used a simple, yet deep philosophy as the basis of my morality.
Most people are familiar with the complex set of rules of their religion.
While not meaning to be disrespectful, I propose that these complex rules are the result of two phenomena. Firstly, there's the paradoxical nature of moral issues as I said before, which makes a simple axiom look complex, when you only see snapshots of it in action. At the basic level, I come to the same conclusions as many deeply religious people on mainstream issues, even though our methods are radically different. The second reason for the complex rules is fear. Some people fear God so much, they don't believe in a God at all.