Religion isn't the only area of life that chooses belief over facts. Here's an (apologetically very long) article on why companies choose not to use evidence-based management.
The article admits that research can be a bit hard to come by, interpret and put into practice. But from my personal experience as a marketer, creating tests and gathering data to measure outcomes always outperforms "intuition." We just have too many blind spots to manage otherwise. What's been your experience in applying scientific methods to business management?