Years of ZIRP, QE, bailouts and stymulus money muddled the waters a lot. Add to this the Old Boys (and Girls now) Networks, a culture that values getting money fast as the ultimate value, the prevalence of politics and you end up getting a boatload of bad CEOs.
There was a time when I used to recommend "Out of the Crisis", a book from Demming, to business leaders.
Problem is, "Out of the crisis" still assumes as a premise that companies compete on the quality of their products, that making money comes from actually making and selling stuff. That leaders are not the anti-intelectual morons that believe that absolutely any thing can be explained with a 15 minutes deck, that math and statistics are passtimes for weird geeks that don't add "business value" and because of that, is a book that could have steered us toward a better world in the 80s, but now it is completely useless, because its recipes can't handle the level of degradation things goto into.