Quoting from Bruce Watson: "To make a living at fine-art photography, you have to love selling your work more than you love creating it."
WRONG! That sounds like sour grapes maybe. I know many full-time photographic artists, and we all dislike selling our work. It's a "chore" part of our job that we do because it goes with the territory, not because we love selling more than photographing.
Far as I can tell, to make a living as a photographic artist you have to take the risk of committing yourself to making photographs that are engaged, unique, and creative. And you have to send out portfolios, work with galleries and do the "business" side as well. The trick is that it has to be both things; doing one but not the other won't get you there either way.