They speak for large numbers of people. These qualities are indispensable, but alone, they are not sufficient. Being right is not enough. An organization must also have the power to compel the person who makes the decision to give the group what it wants. In every case there are strong forces on the other side that are trying to make that decision go in the wrong way.
Strategy is about getting that power.
The key lies in figuring out the cost to the Decision Maker of various actions that your organization can take in the public arena, so that you can get concessions for not taking them. This is why thinking strategically matters.