So the first chunk of this subject seems to be devoted to getting us to 'unleash the dragon' in relation to our creativity reserves.
Most of us are a little rusty in that department. Me especially.
According to Di, it's a writers' volition to tell the world about things. The innate desire to create, to reflect, is something we are driven to share with those around us. Whether it be to make a serious comment on humanity or poke fun at its foibles, the propensity to share that without is part of our cultural makeup. It's what truly helps us form our social identity.
Subtle tension, irony and conflict must be used to a maximum extent, particularly if the piece has been created to serve a greater moral precept. Noir, for example, is a narrative device used to elicit tension. Often, a set of technical formula is so ingrained within a specific genre but that it is indeed subconscious.
Of course, nothing exists in stasis - so these genre are continually evolving, growing. This is also relative to ever-changing values of the viewing audience, who as educated moviegoers are anything but a static, homogenous group.
Today, the sky is in fact the limit when it comes to putting a pen to paper and writing for cinema. Though there may not be a one-size-fits-all approach, the main thing is to relax with the medium and trust one's instincts. Then, and only then will filmmaking retain an element of unrelenting truth... no matter how fictitious the premise or story.