Whereas fiction is a continual discovery of what one wants to say, what one feels, what one means, and is, in that sense, a performance art, biography requires different skills - research and organization.
Many Japanese painters and calligraphers would change their names intentionally to keep their relationship to the art always fresh. This way, others' expectations can be avoided.
I have respect for those who make money at art and do it well and smartly, because that commercial aspect keeps the world going and running, in a sense.