an "artist" is someone who produces a supply, whether or not there is any 'demand'. This leaves open definitions of good art and bad art.

If you create something not naturally occuring, in order to achieve an aesthetic, rather than simply practical item, it has an element of art.
I have my reservations when it is done randomly, as by throwing paint at a canvas, but even adorning a pretty girl with ... ummm... 'interesting' items of clothing and other accouterments is a 'sort' of art. I prefer art that is permanent and more publicly accepted, but *shrug*