In short when our ancestors got wind of the fact that one could market faith, one could also market education and keep the faith and market limited to a niche segment of 'clever' humans who would defend the faith and keep trade secrets within the profession as much as necessary to keep deriving profits from the 'ignorance' of their consumers (patients)? Formalizing faith based medicine using market derived mechanisms thus created a sustainable business for the health professional community? Image credits: https://www.bestgoadeals.com/uploads/hotel/pics/356_logopic_shangrila_jungle_village_goa--4-.jpg , http://worldalldetails.com/article_image/costa_rica_america_134592.jpg