Would like to point out (I did go to business school) this may very well be something they teach in business school (I don't really remember) but much of business is really common sense at least with respect to entrepreneurship. (Which is why there are so many successful people that did not go to business school). Not to mention the fact that even if you do learn this in business school it might be any number of things that you learn without any degree of "how important is this anyway". Think of reading a "man" page with a million options and arguments. Someone with real life experience knows what is really important from experience to concentrate on. Anyone can memorize things.