Having high-potential employees does not guarantee that they will succeed. In order to provide new employees or current employees with the skills they need to perform their jobs, an employer must provide training. Training provides your employees with the tools they need to do what you want them to do; how you want them to do it.
It is ironic that the very strengths that get managers "fast tracked" early on in their career, can sometimes also bring about their downfall. These high potential managers are developed at an extremely fast pace and are expected to rise to the top of the organization. Their focus is mainly on the operational side and they invest all their energy in the organization, at the expense of paying attention to their own growth and development.
The current work culture is one of "work harder, work faster and produce the results" which could translate into extremely long working hours and a tremendous amount of self-sacrifice from the majority if work becomes the ruling (but no longer enjoyable) passion of some people.