This will help your agency, and help the client's business. But it won't help you. All that will happen is that you will soon be given another shit brief. Do a good job on a shit brief for a second or third time, and your career is over. Your book won't move forward. And when the next round of redundancies comes, the fact you've been doing a valuable job is forgotten. All anyone will notice is that you haven't done a good ad in a long time.
So it's vital to develop an ability to avoid shit briefs. And the best way to avoid them is what I call Playing To Lose. Years ago, when I worked at Saatchis, some friends of mine (who were a very good team) got briefed on Oil of Olay. They came back with a script about a woman who is dead. However, because her friends regularly apply Oil of Olay to her face, no-one realises. (The idea was based on Weekend At Bernie's.) A fun and lateral way to demonstrate what the product does for your skin, but not something that Procter & Gamble could ever buy.
K**** and C***** were never given a P&G brief again. And yet, no-one could say they hadn't tried, or hadn't done a good job. And that, my friends, is Playing To Lose.