Everything gets better with practice. We all know this. That's why if you've been driving for 20 years you're no longer as scared or timid as you were in the first 20 days.
So why wouldn't you take the time to hone your skills when writing fiction. Just because you're making the story up in your head doesn't mean that you don't need the mechanics of building a story to be spot on.
For everyone who has ever tried to construct a good story, there are pitfalls and frustrations you'd prefer to get over so you can get on with it, and this will help you do that faster.
If you want to write great fiction, let The Great Courses help!
To learn more, please go to http://www.greatcourses.livejournal.com.