Nice Sun Tzu quote, but your use of the term strategy to make your point is incorrect. A strategy isn't flexible, (it could be under developed) but it isn't flexible. A strategy defines your goals or end state. Tactics like plans on the other hand put the strategy in motion and can be flexible dependant upon the circumstances when they are developed and after they are undertaken.
True. I get that. Strategy to me, is a plan of action in conflict/some kind of combat, such that you define how you're going to get to the goal - and the goal is always victory - and that strategy isn't going to change depending on localized/individual battle circumstances. Tactics are developed out of that strategy, to meet the localized, individual battle environment. In football it's pretty simple, there are really only a limited number of general offensive strategy decisions (run to set up pass, or pass to set up run) (zone approach vs. man/man approach)....etc.
I started down that writing path because I wonder if we have a consistent strategy at all on offense, and it bothers me that I have to think that. It seems that the coaching staff seems all too willing to game plan week to week, such that they will do literally almost anything, at any time on O, and send the players and ball in any direction/manner they see fit, if they think there might be a weakness somewhere in the opponent that can be exploited.
Therefore the strategy to reach the goal - to win, appears to simply to find the weakness in the opponent, and do whatever we can devise to attack it.
In pro-football, where teams are so evenly matched across the baord, that makes sense. But college ball is different, lots of difference between maturity, talent, and skill level from week to week within your own team, and in the team across from you.
We'll see what happens the rest of the way.
Sun Tzu - pretty clear about what happens with tactics only, and no strategy.