One of the qualities of writing that is not much stressed is its problem-solving aspect, having to do with the presentation of material: how to structure it, what sort of sentences (direct, elliptical, simple or compound, syntactically elaborate), what tone (in art, "tone" is everything), pacing. Paragraphing is a way of dramatization, as the look of a poem on a page is dramatic; where to break lines, where to end sentences.
Style is a very simple matter; it is all rhythm. Once you get that, you can't use the wrong words. But on the other hand here am I sitting after half the morning, crammed with ideas, and visions, and so on, and can't dislodge them, for lack of the right rhythm. Now this is very profound, what rhythm is, and goes far deeper than any words. A sight, an emotion, creates this wave in the mind, long before it makes words to fit it.