Now we're back on track. You are citing an old, outdated, obsolete convention. Furthermore, the photographer is an active agent in the process of making a photograph: all the way from determining the scene that the lens renders, to the final product, the print.
Modern convention dictates that some (not all) photography can be art. Corollary: some, not all painting can be art. The fact is, we are all appealing to authority...albeit different authorities. Your argument is no stronger than that of the dissenters.
It's not old or obsolete. I'm pointing out that
if you claim that there is self-expression in photography (which I deny to begin with, but never mind that for now)
and that's what makes it art, then what makes the Egyptian statues and carvings art, when they are not the product of self-expression?
Your claim is that
some photography can be art if it's "good enough", essentially. Correct? My claim is simple: it's art because of the manner of its production. All art must be 'hand-made' to be art: