Developing excellent COMMUNICATION skills is absolutely essential to effective leadership. The leader must be able to share knowledge and ideas to transmit a sense of urgency and enthusiasm to others. If a leader can't get a message across clearly and motivate others to act on it, then having a message doesn't even matter.
That ship is loaded with treasure, but there's a hole in the ship. And my job is to get everyone to row in the same direction.
Socrates was a philosopher. He went around pointing out errors in the way things were done. They fed him hemlock.