I understand what you are saying but I would disagree with your approach as it is presented above. Certainly emotion is a concept that one wishes to convey in an image but in order to do so one must first speak the language. When we talk photography, the inherent limitations we place on ourselves by using the tools that we do, namely the camera, ties us to the very simple language that those tools speak. In the case of a camera the only language it understands is light. The camera does nothing beyond that. Our choices with regards to what light enters the camera is what determines how well we communicate emotion. I.E. The color blue is widely seen as cool, calm, sometimes downright depressing, other colors are considered warm, invigorating, and uplifting. Our choice as to the qualities of light is how we suggest to the viewer what our intent is. Piecing together certain qualities of light is how viewers interpret meaning. Some photographers are better communicators than others because they understand the very simple notion that the qualities of light displayed will define the photos meaning. As a quick side note, when we are communicating with a limited language such as light, simplicity rules. We can get into that more later though.
Most people who never think about their shots, take your typical point and shoot shot for instance, rarely communicate the emotion the shooter felt at the time of capture because they are not using the right words or concepts to convey the message clearly. Typically most people produce what I consider a complicated mess, a mess which typically can only be interpreted by the person who shot it, and thus irrelevant to everyone else.