The comment about the “author’s way is best” is not an evaluation of the validity of the author’s opinion, but that it represents the argument the author makes. It is a comment on the author’s intent, not the message represented by the author’s argument.
The comment about fully exploring any issue is a broad generalization about the nature of a grand argument story. In other words, the storyform represents a sufficient set of components to make a complete argument/grand argument story. It’s not meant to be hyperbole, but it may come off that way without providing the contexts and caveats a longer description might include.
Are all narratives grand argument stories? No. Not even close. Most stories contain aspects (story points) of a storyform, but only a grand argument story has them all (by definition).
Are all well received narratives based on grand argument stories? No. The storyform is only one of four major phases that go into the creation of a grand argument story, and positive reception may be indifferent to well ‘formed’ stories.
Are all grand argument stories successful narratives? No. Storyencoding, Storyweaving, and Story Reception play a great part in how well a finished work successfully communicates the underlying universal meaning/message baked into the storyform. Authors are responsible for the choices they make in creating and telling stories. Audiences are responsible for interpreting the stories in way meaningful to their own lives and experience. When there is a meeting of the minds between authors and audiences, there can be ‘magic.’ Our interest was to make the magic a bit more understandable and repeatable.
So, our comments are meant to be objective descriptions of grand argument stories, not all narratives, nor the success or failure of the efforts to communicate an author’s intent. Our primary goal was to describe as accurately as we could the elements and processes that comprise the creation and analysis of grand argument stories, as well as the larger connection to the processes of human problem-solving and psychology that they mirror.