Not wanting to defend Rowling, since she’s an evil and hateful person, but there’s many great authors who fall foul of basic arithmetic. I would argue that they are completely separate skills; TV Tropes has a good list. (Also, I’d argue that most of her good ideas were taken from someone else.)
She can’t keep consistent with her dates and how long ago things were
She had good ideas but is a bad author
Not wanting to defend Rowling, since she’s an evil and hateful person, but there’s many great authors who fall foul of basic arithmetic. I would argue that they are completely separate skills; TV Tropes has a good list. (Also, I’d argue that most of her good ideas were taken from someone else.)
https://tvtropes.org/pmwiki/pmwiki.php/Main/WritersCannotDoMath