Jon, though you addressed it to Bee, this is my own viewpoint on your question on the distinction between writing and story.
Analogous to writing, computer-based product creation involves the technical side of things (programming code, syntax), the visual side of things (interface, complexity of use), and the utility/importance of the project (whether you should have bothered in the first place because it is something NOBODY in or out of their right minds would buy).
In creative writing, you have matters of precision of verbiage, to include proper use of words, attention to verb/noun issues, and use of words consistent in difficulty with other words in the same passage. Then there are matters of style, including 1st, 2nd (rare), or 3rd person; fluidity of action narrative and/or dialog descriptions; lushness of scenery descriptions; and glimpses of protagonist thoughts. Add to that the basic idea that the story has to make sense.
The parts that improve with practice are the first two groups of things I named. Word usage issues, clarity of writing issues, and the like. But the wild card in all of this is whether your story leads to a good or a bad situation. I cannot speak to Bee's style, but for me, a bad story concept will quickly lead to an untenable situation that either goes nowhere at all or goes somewhere where nobody cares to follow.
Of the seven stories I have started, I finished five with clear start, middle, and end situations. One is still in work with a clear start, clear middle, and no end in sight though I knew where I want to go, I'm just having trouble getting there at the moment without making it obviously contrived. The last story fell into the untenable pit and I am still wrestling with trying to decide whether it has a future or not. At the moment, I'm thinking "not" but am unsure enough that I have not deleted the files yet.