A photographer spends time on equipment and technique. An artist spends time on ideas and themes.
A photograph and a conceptual photograph both rely on an image captured well through a camera. For a photographer, that is the end goal. For a conceptual photographer, it’s a good start.
In photography, the imagery seems largely the same, so you promote yourself. In art, people seem largely the same, so you promote your idea.
A photographer captures an ideal. An artist captures an idea.
A photographer seeks to break down an image into its components. An artist builds a whole that is greater than its parts.
Photographers are a large group filling a finite need. Artists are a small group filling an infinite need.