Which works, up to a point. But there does come a point where you’ve changed so much from the recipe that cookbook isn’t actually helping you any more.
It also doesn’t work very well if there’s a metaplot. I’m not sure how to fit that into the cookbook analogy, but if you make changes to a setting with a metaplot, and then the metaplot advances in a direction that doesn’t mesh with your changes, you reach that point where the book is no longer helpful to you much faster. Which is I think part of why metaplots went out of fashion after cWoD’s ended (originally).