I doubt that many would disagree with you there. However I would argue that there is value as a learning tool in concentrating on particular facet of the photography and setting aside concerns of the image as a whole.I guess what I am saying however is that when I look at images, I don't look at them based on just that element or how well that element is used. I look at the entire image.
I think most people enjoy photographs on their merits without deconstructing them. I also think that a lot of people learn photography by specifically deconstructing photographs that they like and evaluating why that photograph worked and then thinking about how they might bring those elements of photography into their own work so as to improve. This will often be by mimicry at first but this will generally evolve into something that is their own. Part of this process is about experimentation with that concept, which is what I would say this thread is about. This is certainly one of the routes that I take to learn photography and many other things in life and I imagine that many others learn similarly.