To get back to the OP's question and concerns, the problem as I see it is, running a business is not easy. Running a photography/fine art business is not the same as taking good photos. They are two separate skills. I sell the occasional photo, which pleases me somewhat, but I'm certainly glad that I don't have to sell photos to make a living.
I believe that running a restaurant is one type of business that so many people think they can do because there's someone in the family who can cook tasty food.
However, restaurant enterprises seem to fold faster than any other type of business because there's much more to running a successful restaurant than being able to cook a tasty meal.
For me, time spent trying to sell photos is time that cannot be spent taking photos, processing photos, trying new techniques, experimenting, travelling and generally having a good time pursuing my hobby .