This subject has come up her often. I happened to come upon an article talking about the amateur vs professional writer and the first one sort of addressed this. It is:
THEY ONLY WRITE DOWN ONE-TENTH
1/ Amateurs see their story playing out in detail in their mind and only write down about one-tenth of it. In their mind it makes sense, but to anyone reading their novel they cannot make sense of anything happening. Whereas a professional writer would spend the time necessary writing down everything necessary for the reader to understand the story. Describing the details of the background, characters, and locations. Painting the correct picture for the reader to see. All ten-tenths are described not, one-tenth.