Photographers were making photos long before multi-colored cameras. And then the photographers had no choice: it was all black-and-white. It would seem that the benefits of shooting in color are vividly seen and there is a need to use the latest technological advances.
However, there exist something in a black-and-white photography that is difficult or even impossible to convey in color. Therefore, the art of monochrome photography is the art of penetration into the essence of things, in that what is hidden from prying eyes. And if it becomes possible, the photo will turm into a masterpiece. This is just the rule and art of black-and-white photography.