There is a big difference between a Manager and a Leader.
A Manager focuses on moving people around to achieve a goal. It focuses on capacity management, resource distribution. A manager is pragmatic but very often bound and constricted by pragmatism, by a budget, by what an spreed sheet says it is possible to achieve.
A Leader goes going beyond what is theoretically possible because he focused on potential, his mind is in executing a vision not in the limitation of what he has to work with.
Leading is about moving an idea from point A to point B taking the best out of everyone to achieve a common goal.
Good Management is always channeled through a leader, its is apolitical, it has a very clear underlying vision, and an objective strategy to deliver it.
People that are being led properly feel they can overcome obstacles and can go beyond themselves, they are working for something that is greater than their own self interests.
Nobody really wants a boss, but most people will agree that having inspirational leadership that is grounded and guided by a clear vision is a valuable asset to have.