The 'fine art' descriptor makes sense to me just to reinforce the notion that it doesn't include weddings, bar mitzvahs, car crashes and perp walks. I think it also suggests, perhaps pretentiously (though I like to think it doesn't) that there's a bit more to it than what would constitute mere 'decor' making, even if that's how it eventually ends up. It's also a bit more streamlined on one's business card than "Photographer of Images That Are Only Intended for Display, Contemplation and Aesthetic Stimulation Inc."