It is not for the sake of rewriting but for the sake of improving.
We are now heading to the next project which consists of 150 pages. Some of them ranked very high with almost 3k visits per month. Total of 100k visits for the all 150 pages and a potential of ~500k.
This time, the writer is top professional on the subject matter and she is free to delete entire paragraphs, change and edit.
It might be against any SEO rule, but I don't see any other option if I want to beat the competition.