There are two problems: statistical knowledge being easily faked or misinterpreted and life being a multiple-repetition game.
It is hard to apply the knowledge of “many X are Y and it is bad” when X is easier to check than Y in such a way as to not diminish the return on investment of X who work hard to not be Y. The same with the positive case: if you think that MBA programs teach something useful and think “many MBAs have learnt the useful things from MBA program” then getting into the program and not learning starts making sense. And we have that effect!
There are two problems: statistical knowledge being easily faked or misinterpreted and life being a multiple-repetition game.
It is hard to apply the knowledge of “many X are Y and it is bad” when X is easier to check than Y in such a way as to not diminish the return on investment of X who work hard to not be Y. The same with the positive case: if you think that MBA programs teach something useful and think “many MBAs have learnt the useful things from MBA program” then getting into the program and not learning starts making sense. And we have that effect!
http://www.freakonomics.com/2011/10/12/why-do-only-top-mba-programs-practice-grade-non-disclosure/