Rowling is quite an outlier - 1% of 1% of 1%. While a fascinating example, it seems unoptimal to center copyright protection laws around her experience.
Not if your goal is to help the greatest number of authors, but it might be if your goal is to help the greatest number of readers. Since a single book can be enjoyed by many, it's arguably better to have a single book that is very liked than one thousand books that nobody really likes to read.