1401b wrote:
Every sentence must further the story line, remove every sentence that does not further the story line.
or something...
I think that you're confusing fiction with technical writing.
For fiction, I find that descriptive language can make or break a story. The descriptive elements that you say add nothing to the story are often extremely important, for imagery and character development. Descriptions are necessary to transport the reader into the world.
Here is a paragraph from "David Copperfield" that uses a lot of descriptive language in a way that really draws you in:
"It was such a strange scene to me, and so confined and dark, that, at first, I could make out hardly anything; but, by degrees, it cleared, as my eyes became more accustomed to the gloom, and I seemed to stand in a picture by Ostade. Among the great beams, bulks, and ringbolts of the ship, and the emigrant?berths, and chests, and bundles, and barrels, and heaps of miscellaneous baggage ?'lighted up, here and there, by dangling lanterns; and elsewhere by the yellow daylight straying down a windsail or a hatchway?were crowded groups of people, making new friendships, taking leave of one another, talking, laughing, crying, eating and drinking; some, already settled down into the possession of their few feet of space, with their little households arranged, and tiny children established on stools, or in dwarf elbow?chairs; others, despairing of a resting?place, and wandering disconsolately. From babies who had but a week or two of life behind them, to crooked old men and women who seemed to have but a week or two of life before them; and from ploughmen bodily carrying out soil of England on their boots, to smiths taking away samples of its soot and smoke upon their skins; every age and occupation appeared to be crammed into the narrow compass of the 'tween decks."
That paragraph could be summed up in about 2 sentences easily, but would it be nearly so interesting to read that way? Now with that said, some writers do describe things in an incredibly unimaginative and boring way. (Like: I entered a room. A lamp sat on a table, and there were four windows on the wall. There was a rug on the ground). I would just call that bad writing though.