In most cases, greatness doesn't come from doing the same things but trying harder. When you do that, even the combined efforts of all of your people are too diffuse to make much of a difference. Like having hundreds of people pushing with their hands on a brick wall, you spend a lot of energy getting nowhere.
Greatness comes from focus.
Having the effort of those hundreds of people translate into a single point of impact, like a single sledgehammer, will definitely have more impact. Successful companies often have one main core competency, or a closely related cluster of core competencies that support each other. Core competencies are the key skills, characteristics and assets that your company brings to the marketplace. These competencies, on an organizational level, are a synergistic blending of the core competencies that your people individually bring to work every day. If you have to think about that more than a second or two, it may be too complicated.