[fjtorres]

Do note that he doesn't really say that editing is optional; he is saying editors are not supreme in the self-pub supple chain.
He's talking results, not process, and responsibility.
In traditional publishing the author rarely gets the final word on the form of the finished product but in self-publishing the author is the publisher so he is 100% responsible for quality control. He is reminding self-pubbers that when they hire an editor they are under no obligation to accept *all* the changes but even if they do, they are still responsible for the output.