Well, yes. A well composed, decisive moment, "snapshot" that connects with the viewer on an emotional or intellectual level is a legitimate piece of Photographic art even if it was taken with an Instamatic by someone that has never given a serious thought to photography. I have certainly seen such Pictures. It is exceedingly rare but I believe that an image must stand on it's own (even if it is digital [...shiver]). On the other hand, a person that devotes decades to studying and practicing the creative and technical aspects of Photography, who lives every day viewing the world with an eye towards illustrating it in a frozen instant and is fully prepared at that instant to capture it and who is constantly refining their results with a critical eye is infinitely more likely to produce such meaningful images.