I agree these rules are useful, but I will slightly counter with the fact that these rules are conditionally useful. I would adhere to all of these except in the limited contexts stylistically that can benefit. For example, some kinds of styles of novel writing can benefit from breaking most of these, however not in every passage. Again it goes back to know your audience and your goals.
If you want people to understand and consume your writing easily, than these rules are pretty good. They are close to what is taught in journalism school as well. Journalistic writing rules are quite useful for tech articles, blog posts, social media, etc., but less useful sometimes for more exciting creative writing. Sometimes rambling and using huge words is a style and a signature of a writer. The same writer might fail miserably writing like that writing a different story that needs a more to the point, simple style.
If you want people to understand and consume your writing easily, than these rules are pretty good. They are close to what is taught in journalism school as well. Journalistic writing rules are quite useful for tech articles, blog posts, social media, etc., but less useful sometimes for more exciting creative writing. Sometimes rambling and using huge words is a style and a signature of a writer. The same writer might fail miserably writing like that writing a different story that needs a more to the point, simple style.