Well, that's Mr. Pohl's position, which, to be honest, does seem to have been designed to cut the ground from under his competitors.    It never makes much sense to allow a practitioner to lay down the ground rules of practice.   Pohl stands in the same line of charlatans as Alban Berg, Picasso, Schoenberg and, well, Kubrick and QT    Schoenberg tried to dictate how music should be written;  Pohl wanted to set parameters for SF.