Earlier quoted context omitted.
Each to their own of course and I have no scientific evidence to back this up but my guess is that only a fraction who ever become successful entrepreneurs take courses in entrepreneurism. The rest see an opportunity and hire the financial, legal and technical and other advice they need.
Real value of the course is the opportunity to get one-on-one sessions with experienced mentors; my guess is that the majority of successful founders have received advice that was crucial to their success.
IMO what you will find the most is that luck has a proportionally large part to do with your success.