It might just be rational. Famous people have to guard their time carefully, or it will be eaten entirely by the demands of others. I'm not famous and I don't

It might just be rational. Famous people have to guard their time carefully, or it will be eaten entirely by the demands of others. I'm not famous and I don't mind taking time for the 1 person a day who asks me to think about something. But if there were 100 people a day doing that I might have to prioritize.