It's just that the rules of the game of the advertising industry entail that the director comes on only after planning is finished, after the creative concept is finalized, and even after the colors of the props have been settled on.
只不過廣告業有個強勢的遊戲規則，往往企劃完成、創意完成，連道具都已規定好了要某種顏色，一切就緒後等著導演來執行。