I've thought about that and what that means. A really significant number of my friends write fiction. But I don't. I think that the major part of it for me is that I have no stories burgeoning inside of me wanting to get out. To me, an author writes because they have stories inside them needing to get out. In much of the fiction that I like, the author describes the writing process as the characters doing the writing with the author along for the ride. Well, I don't have those. I have ideas that need to be expressed and events happen that I want to convey to others but I don't have my own stories to tell.
So, originally, in all the places that you see author, I had originally put writer. The jury is still out on whether or not I am a writer. If a writer is simply one who writes, then I am one. But I am not an author.
Note: I am not looking for reassurances of being a writer or an author in this piece. If you'd like to comment, I'd prefer discussing what makes an author or a writer. Why you do or do not write or author stories.