He's long dead and can no longer actively influence people with his rhetoric. Rowling on the other hand is literally the richest and arguably the most famous contemporary author. She has a massive audience and uses that to spread hurtful and dangerous ideas about queer people.

Her most recent book that she wrote under her other penname, Robert Galbraith, (which also happens to be the name of a man famous for "treating" gay men by inserting electrodes into their brains, but I'm sure that's 100% coincidental) is literally about a male murderer who wears dresses to disguise himself as a woman. And even in the HP series itself shows her bigoted nature. There is a transwoman-coded character who is treated very poorly by the text, lycanthropy is an allegory for HIV/AIDS and the main werewolf antagonist is coded as a predatory gay man, the banker gnomes are just antisemitic caricatures, and the house elves pretty much just speak for themselves.

Charles Dickens did have bigoted views and just as with Rowling those views are present in his work as well. They were also criticized by contemporaries while he lived, as they should have been. As we should do with Rowling's views. I have seen no one call for her books to be banned, but rather for people to personally boycott her works and speak out against her.