Frameworks save time.
No matter what industry you’re in, frameworks abound. In manufacturing, they have systems like Lean and Six Sigma. In software design, they use Agile Scrum, and there are about a billion quality assurance processes. In fiction, there are popular models like Save the Cat and StoryGrid. (I’m going to mention The Heroine’s Journey here, because you really should check it out.)
Each one of these systems is intended to solve a problem for you. Each has its own strengths and weaknesses. Are any of them totally correct for any given situation? No. Will any of them handle all eventualities? Also no.