Book learning isn't enough. A mistake is an event, the full benefit of which has not yet been turned to your advantage. Yesterday's technology is obsolete today. Today's clever innovation is tomorrow's commodity. Solving one case is no guarantee about your success with the next.
Rules change constantly.
The future is a moving target. One prospers in these conditions by developing good process skills, and a personal ability to adapt rapidly to change. The case method, with its steady change of issues from day to day, helps develop this capacity to adapt. In dialogue, people become observers of their own thinking. The capacity to learn depends crucially on the ability of an organization to have a dialogue within itself, because it is through dialogue that thinking is critically re-evaluated.