Steve Martin is in trouble.

For luring people to pay $50 to hear him interviewed and then having the interview be all about the art world and his book about the art world.

It is exactly — exactly — like demanding your money back because Elton John didn't play "Rocket Man." 

No, it's like going to see Elton John and demanding your money back because he played only classical music — and not at the level of a professional classical pianist.