Sun Tzu's method is called "winning without conflict" because the heart of the method is advancing your position while avoiding destructive battles. While all battles are destructive, the most destructive are those attacking an opponent's strong point. As the saying goes, it doesn't matter if the rock hits the pitcher or the pitcher hits the rock, it's going to be bad for the pitcher. When you don't see an opening to move into, you are better doing nothing that simply attacking for the sake of fighting.