Heck, if a potential customer knew the wedding shooter (or commercial shooter) they were considering could be shown an example of his work in a "fine art" magazine like B&W... that might drive sales far more substantial than what collector markets could drive alone. Does Alec Soth's work invalidate itself because he shoots for W or Paris Vogue or whatever? I doubt it. Taryn Simon? Mark Leong? Nope and nope.... Avedon or Arbus? Do we readily dismiss Steichen because he produced (the first) cardboard-stock photo books for babies?