Just consider a teenager who decides to write a love novel out of her extensive knowledge on the matter. Some aspects of it might resonate with most people, those would be the more common patterns. Other elements however might be missing to the more mature audience, who has gone through a lifetime of more complex relationships.
I would imagine that fictional writing for business is similar. You could write based on general theories and sound somewhat "accurate", but the devil is in the details and having first hand knowledge of more subtle patterns (usually overlooked by most theorists) allows you to measure their importance in that context. Good examples of such intricacies can be found if you dig into the psychological aspect of running a business. What sort of poorly documented, yet very common patterns can you find?
Imo, that's what would give realism to an otherwise very entertaining fictional story and credibility to your lessons.
It's always your opinion, whether you know it or not, but yeah, some people's opinion is more worthwhile than others. I'd happily read any random stuff written by a Hesse or a Marques, because their opinion is gold dust.
Ultimately, there's no substitue for that but personal growth, observation and life experience, and no way, as far as I can tell, to accelerate it other than having very unfortunate events befall you (a kid growing up in a war zone will easily have more life experience than a much older person with a steadier life).