Stars in denial fear image-ruining P.R. when affliction hits, and often decline to reach out to an organization. PAN's Rosenfeld contends that with the film and media culture, the public feels that they know somebody who has come into their living rooms. When something happens to them, it's the tribal instinct. This gives an opportunity for people to feel connected to a famous person. The statistics and numbers don't mean as much until you put a face on it.
Politicians are aware of publicity.
And while Michael's visit hasn't translated into specific money yet, it was a tremendous help. Politicians are people, and they tend to be more interested when celebrities speak out. The attention of the press and public is brought into greater focus. And there are those voters who are now motivated and focused. And that will get attention.