A photograph records both the thing in front of the camera and the conditions of its making. . . A photograph is also a document of the state of mind of the photographer. And if you were to extend the idea of the set-up photograph beyond just physically setting up the picture, I would argue that the photographer wills the picture into being.
But happiness is not always loud and bright and crowded. Happiness ripens like a watermelon, sweet and rosy on the inside with only a thin top layer altogether free of small black pits. And, like a watermelon, the whole thing can be covered with a plain dark rind.