Here's a great article (thanks George), one that ties decision training to myelin and failure. That's a very interesting association, for sure.
The crux of the article, for me is the connection between building myelin and the need to make a decision, fail the execution and learning from it (feedback). This takes a lot of practice and feedback, obviously, but also implies the need that the athletes take the decision.
From here, the realization that by commanding the athletes all the time, telling them exactly what to do is actually disabling that process, by removing the decision component.