Why is so much Harry Potter fanfiction still being written?

Fanfiction writers lean progressive, and progressive folk tend to hate JK Rowling's fucking guts, so I don't understand why the property continues to occupy so many writers' attention. Surely all these fanfic writers would be happier writing about a franchise that was less irrevocably tainted by the author's toxicity. If I were in their shoes, I'd find the cognitive dissonance to be exhausting.