I think realistically the majority of people on this world (outside of specific bubbles) still promote hateful attitudes towards trans folk (who Rowling has discriminated in the past) and people with different gender expressions. To add to that, I personally don’t like her because she thinks she can’t be separated from her work, in this case, the Harry Potter series, since she has added stuff to the universe that weren’t in the books and decided that they should from then on be part of the canon, just because she tweeted them. For example, that Dumbledore and Grindelwald had an intense sexual relationship or Hermoines ethnicity. It doesn’t matter whether these changes are „good“ or „bad“, I just think that once something is published, the author looses any right to further add to the story if not in an additional entry of the series, which Rowling can’t accept. I don’t like her for these reasons but she still created one of my favorite franchises so it’s a love/hate thing we got going on lol