The object of making a photograph is to make the viewer experience what you felt when you were moved to make the picture. At least that's what some of us believe.
What, then, are words for ?
Words come into play... stories... when the image is tangential to the message or emoton, or when irony is the motive, or when the image is sentimental. In other words, when the photographer doesn't know why he made the picture ( at an intuitive, not analytical level )... a story is needed to make the connection with the viewer.
A good, or succesful, image elicits the story from the viewer.