Anytime anything popular gets dragged here there’s always a few “let people enjoy things” and “don’t ruin peoples fun” and “don’t be a weird cynical hipster” and what have you.
Except for the most popular series of children books in history. For whatever reason that’s apparently weapons free for Hater Team 6 to go to town on. I’ve seen people say was shouldn’t ruin peoples “favorite toy” when it comes to sports, Twilight, Marvel Movies and astrology, but what makes those sacrosanct and Harry Potter fair game?
This applies somewhat to Hamilton too.
My guess: Harry Potter and Hamilton are held up by liberals as serious lenses for analyzing politics. The other media you mention isn't use that way to anywhere near the same extent.