I think you may have part of the answer. Many people are not able to deal...
...with serious illness. I've seen dozens of examples of this when I worked in hospitals for seven years. It defies logic, but it is a real issue for some people.
As gracious as her TV persona tries to be, what if she knew she would not be able to handle the meeting without going to pieces? Could it then be argued that declining the invitation to meet with him is actually in his best interest? She knows herself better than anyone else.
That being said, there could be 100 other reasons for this, and I, for one, would not rush to judge her. It's easy to ask why she wouldn't take time to do this, but keep in mind each person is different. One afternoon at the DMV will confirm...
Michael