I heard an investment advisor say recently "I don't care about strategic planning. I do things instead."
To some people, "strategy" seems to have became the opposite of "action". Bad strategic planning (i.e. planning with inadequate buy-in from leaders, no follow through with action plan) is a waste of time. But if done right, it's usually the difference between success and failure. And if you're already successful, it's probably the difference between success and luck.
I was really glad to have found this article written by Mike Jacobs, men's soccer coach at University of Evansville. It's a quick and simple read for those that could use some convincing that strategic planning is the precursor for (not the opposite of) action.