The great enemy of clear language is insincerity. When there is a gap between one's real and one's declared aims one turns as it were instinctively to long words and exhausted idioms like a cuttlefish squirting out ink.
Actually I think Art lies in both directions - the broad strokes big picture but on the other hand the minute examination of the apparently mundane. Seeing the whole world in a grain of sand that kind of thing.
