Because writing doesn't really work like that, the reason we get bland writing is because they keep adding extra chefs.

Thay get these professional writers that learned formula in school and apply it to sections of someone else's work and wonder why the result is an ugly tapestry of formulaic rubbish.

All the things people love are written by people with passion for the project, then they get a budget increase and professional industry writers get brought in and it's all shitty generic snappy dialog and dramatic posing that feels uncomfortable and awkward in the scene.