He mistakes a mistaken analogy. The poets that he names are not selling out live readings and the sculptors are not putting on live creation events.

When it comes to music, yes, a concert tour is more profitable for the artist than their recorded music is. This is the one difference between musicians and other artists.

While I don't completely agree with Arrington, I do believe that this blog post calling it the saddest stupidest sentence ever is guilty of the same sensationalism that Arrington is.