They are in an uproar because they know that very few public people write their own books, but don’t want the public to lose their willing suspension of disbelief. They almost all hire ghostwriters, or sometimes simply buy a book. Its not much different in other businesses. Elvis didn’t write all his own songs. Kubrick didn’t write all his own movies.
You are exactly right. But I don't think anyone is upset that Rush Limbaugh associated with John Fund when Mr. Fund wrote for Mr. Limbaugh. Sen. Obama consorting with Ayers, however, would reveal--quite clearly--Sen. Obama's deceit, poor judgment, and radicalism.