Can you learn an industry without working in it? My boy, that, or rather the converse: that you can work in and manage an industry without learning it, is the great promise that MBA programs make to their students. The idea that there are abstract principles of management, of dressing down subordinates, of bringing in new business and cutting costs (that's all that CEOs do, essentially) that free the MBA from ever having to dirty his or her hands with the business--their primary, all-consuming interest, they protest--is for them a feature, not a bug. It's business processes all the way down...