He's the Decider. The press secretary announces those decisions, and you people of the press type those decisions down. Make, announce, type. Just put 'em through a spell check and go home. Get to know your family again. Make love to your wife. Write that novel you got kicking around in your head. You know, the one about the intrepid Washington reporter with the courage to stand up to the administration. You know — fiction.
In other words, they aren't needed for anything at all.