He is not making a general but a very specific statement about himself and even more specifically about his professional self, i.e., being good at professional(

He is not making a general but a very specific statement about himself and even more specifically about his professional self, i.e., being good at professional(!) writing makes writing for him the most likely way to become rich. What should he have done given his skillset etc. to maximize the probability of getting rich/why was writing wrong/not a high probability move for him?