Some time ago I wrote a Hub on that very subject: Craftsmanship as distinct from Creatvity. Both are needed in the writer, and they are of equal importance; two sides of the one coin, so to speak. In my Hub I mentioned that a famous writer had once said that it takes the writing of around half a million words to develop a 'style.' I believe that to be true.
With the advent of the word-processor, where corrections and alterations can be made with ease, it is easy to alter a thing around so much that it looses its fluidity. When I began writing many years ago, it was double-space on a manual type writer with carbon paper copies. A long, laborious first draft had to then be corrrected with pen and ink, and then the whole manuscript typed again until one was satisfied with it. It was an arduous way to gain a skill but, in retrospect, well worth the effort.
One wonders what some of the newcomers are doing by way of developing their 'writing craft.'