The ad is evidence. Managership must still be practiced but should be related to tasks rather than people. For example, time management, inventory management, or debt management are critical tasks within an organization. But people management is more a function of leadership than a task to be managed. Certain roles within an organization are best suited for people with a task orientation rather than a people orientation.
Leaders are able to show how tasks tie into the bigger picture.
Without a purpose, an employee's only motivation is reward and punishment. Reward and punishment are the traditional methods of motivation by managers. But reward and punishment have limitations. Employees know that they will only be rewarded to a certain degree and that they can only be punished until they decide to make a career change. Leaders create a culture that appeals to the highest need in people.