Not gonna lie... when I first read the Deathly Hallows, I assumed there was homoerotic tension between Dumbledore and Grindelwald. Not many 17 or 18 year old boys spend a whole summer writing to each other, re-reading each others' letters late at night, glorifying their male friend, and waiting anxiously for the owl to deliver their next letter. I never saw an issue with her admitting that Dumbledore was gay because I figured the subtext was already there.

I wish it was more overt in the movies (esp. Fantastic Beasts) but whatever. I know Hollywood is scared to do that in "kids" movies (or movies that will make a lot of money in China). I know someone who worked on those movies and he said Rowling's scripts were like books in themselves, and the studio ended up cutting more than half of the story out.

edit: Also, for anyone unaware, the only reason she admitted explicitly that "Dumbledore is gay" is because the screenwriter wanted to write a scene in one of the movies where Dumbledore talks about a long-lost love - a young witch from his youth. When reviewing the script, Rowling wrote a huge X on the page and wrote "Dumbledore is gay" (and this is what got sent to the media). I wonder if the twitter crowd would have been as upset about the retconning if Dumbledore's straight relationship was kept in the movie. (My guess is probably not).