I know, I was surprised too, but apparently he's a childish asshole and control freak, constantly throwing tantrums and obsessed with his own fame. There's a book about it, I forget the title.
You know what? I don't care of this is true. This justifies my long-standing distaste for Michael Jordan. I think it started when he swaggered out to play baseball and then was awful and gave up after five minutes. Or something. Look, I don't know. I don't have to explain myself to you people.
Also, why the fuck would someone obsessed with their own fame disappear almost entirely from the public eye after one of the most incredible careers in sports history? He's even modest in the underwear commercials.