I hope you don't take this as an insult. It's a compliment for me. I saw your book as a pep talk. And that's sort of what you're talking about being a pro, somebody who's devoted to mastery. The idea of discipline and self control is that you don't taking the craft of forming yourself casually. You can be a workaholic because it's coming from a place of insecurity or running from something.
Author Ryan Holiday talks about his book, Discipline Is Destiny, with EconTalk host Russ Roberts. Holiday discusses the mentor who taught him discipline, the self-control of Queen Elizabeth, the world-champion boxer who counseled the man who defeated him in the ring, and the forgotten Roman emperor who helped make Marcus Aurelius the man he would become.