Yeah Jk rowling has a really wierd thing where her fans are significantly more progressive than her and that ironically she helped make her fans so progressive in the first place. Like, in your formative years you get really into this book and movie series that is explicitly about how racism is bad and how we should all respect eachother regardless of our differences. Has a positive impact right?
But then JK herself really isn't remotely progressive beyond thinking racism is bad. That is the peak of her progressiveness. I'm pretty convinced that the whole "dumbledore is gay" thing was just her seeing how progressive her fan base is and thinking "here these idiots will eat this shit up, Dumbledore is gay!"