Later in the article it suggests that we'll see even more jobs being replaced and eventually all human employment will be obsolete (it doesn't say this directly). Then the author of the book points out that this may be a catalyst for people becoming more entrepreneurial.
To counter the second point; if there exists a point where AI can be applied to essentially any job (doctors, therapists, CEOs, etc.) then why would the job of an entrepreneur exist? What makes that job more special than any of the other highly intellectual jobs out there that are supposedly on the chopping block?
I mean if we're really talking about true AI, one that can medically treat patients, mobilize and palpate, then that same "being" would easily have the mental capacity to start a business.
Point being, it seems contradictory to say all human jobs will be replaced by machines except for this one thing.