I agree. It'd be great if a single image, all by itself, could be a powerful and distinctive statement in its own right. In this modern world, there are so many photographs which have been made it's increasingly hard to make that happen. Most every photograph is basically the same as some other photograph that's already been made. Pretty much any photograph has a pretty strong lineage - 'that's cool, it's a lot like.. ' is pretty much the order of the day.
My thinking is that collections might be where the oomph is to be found today. Sure, we've all seen a photo kind of like that one, and a photo kind of like that one. What we haven't seen is this particular collection of photographs, all pulling together in the same direction.