The Solution Leadership and management are two sets of skills that are not always parallel or even compatible with one another at all times. They take a different mindset when it comes to control, communication, and motivation. Everything within the car is under their direct physical control, or within the reach of someone they can direct. The driver will see the competition and customers weaving around in a busy marketplace, in the midst of a potentially stormy economy, and be exposed to the realities of road construction and obstacles. These are things that need to be communicated to fellow travelers to ensure they make appropriate decisions.
Management skills call for high control and measurability of performance.
Setting an appropriate vision requires both. One of the most famous goals in US History was the commitment made by John F. Kennedy regarding space travel. He committed in a public speech that the United States would send a man to the moon within 10 years and bring him back alive. Do NOT, however, fall into the trap of specifying how. If you are a leader, that's not your job.