Lenny and Ochida being prime examples. No one can feel that much passion, instantly on command.Have you ever make love with someone you are confortable with?
The public disapear for some artist which are only with themselves and their own "daimon", and the feeling which inhabit and haunted them for a work they feel already for a long time is not "on command"....It is like jazz players mimics and odd gestures singing behind and tapping feet....