I wrote this years ago, and just stumbled on it:
You can be a big star, or a successful achiever in any field, but still feel that no one really understands you, that no one pays attention to what you really are or what you really want to express, perhaps because you are afraid to express it. In that case you get very little attention, or so it must feel. Your life is meaningless, since no meaning is conferred on it by others — in ways that feel real to you.
Could this be Jackson’s pain?