Chandler

On the crime novel. And this could certainly be expanded to genre films as well:

The average detective story is probably no worse than the average novel, but you never see the average novel. It doesn’t get published. The average—or only slightly above average—detective story does … And the strange thing is that this average, more than middling dull, pooped-out piece of utterly unreal and mechanical fiction is really not very different from what are called the masterpieces of the art. It drags on a little more slowly, the dialogue is a shade grayer, the cardboard out of which the characters are cut is a shade thinner, and the cheating is a little more obvious. But it is the same kind of book. Whereas the good novel is not at all the same kind of book as the bad novel. It is about entirely different things. But the good detective story and the bad detective story are about exactly the same things, and they are about them in very much the same way.