Some people do a lot as least. Forrest Addy has a massive library of posts that are still the top results on Google for just about any machining problem imaginable.
Some mechanics are just good mechanics, and that's okay.
I remember posting on PM about 15 years ago asking how to fix a mistake I kept making and he gently smacked me on the head and basically said just learn to do it right in the first place. Which was really the only good answer!