I see your angle and I don't play in the competitive arena at all, but another angle is, if your opponent can't shut you down, don't you keep running the same play until they do shut you down?
I don't even know how many minutes are in a quarter in competitive mode, but I don't think I would be able to run many different plays if the minutes are 5 minute quarters.
If batters in baseball can't hit your fastball, why start throwing them curveballs?