I've found that the more I spend time on writing, the ideas that are being written about change in a way that generally coalesces into something better defined and of higher quality than just quickly writing down the initial form of the idea.
Forcing one's self to write, forces more in-depth thinking about the topic, which can lead to surprising and unexpected revelations (which I would refer to as quality writing).
One doesn't need to keep the journey, just publish the destination. The reader doesn't need the journey the writer took, but the writer sure does.