Trying to manage daily operations can often get very emotional, with highs and lows and issues to deal with that sometimes force upon you weeks of lost time, but the situation is exactly the same for your staff, especially if you consider the fact that often they do not have the benefit of understanding the big picture.
A leader must be able to manage people's emotions, bring people up when they are down, bring teams and departments together when finger pointing arises, and above all, to keep people focused on company goals.
An effective leader has to be able to inspire and motivate teams, develop their resources, be more effective contributors, and understand how everyone's work fits in to the bigger picture and to be able to make the tough decisions when it is necessary.
You can't do that with a simple gantt chart.
You need a leader with people skills.