Good Omens finale showed that terrible people who happen to be great story-tellers, once deprived of their readersā support, show that they are, in fact, terrible people through their story telling, harming their readers
The Neil Gaiman example later in this thread is absolutely evergreen because he's such a perfect case study for "terrible people can make very good and very progressive, empathetic pieces of art". The sooner we stop conflating someone's morality with their work the better.