Because without a script he will make W look like a Skakespearian actor.
Post of the day! I like GWB but damn that was funny!
Have you ever seen one of GWB’s town hall meetings? He’s great — well-prepared, warm, and likeable. He does many of them in the round and connects beautifully with the crowd.
Of course, the Drive-By Media would never tell you that. GWB being a clumsy communicator is entirely their creation, pounded into Americans’ heads so relentlessly that it is accepted as fact — the same way the “Reagan is goofy and dense” perception became so widespread.