They could, and this tweet could also be from before Joanne decided to start showing how evil her views on trans people are. When nobody could reasonably expect ND or anyone else for that matter to have started avoiding Joanne's shit. Her Tweet in support of that other transphobe Maya whatever was on December 12, 2019. Two days after this tweet from ND. The only thing anybody "knew" about her transphobic stance was that she'd publicly liked a video by some other transphobe but claimed it was an accident that happened while she was taking a screenshot.

Maybe we could be a little charitable about an objectively speaking rather benign post that comes from the Before Times and still makes an amusing and interesting point about some beloved characters? Even if it does make passing reference to HP.

To be entirely clear. Joanne and everything she stands for can fuck all the way off back to the darkest corner of her fucking castle of mold. But that doesn't mean we collectively have to entirely cut ties with absolutely everything that so much as mentions terms from HP. I may not be a trans woman, but Joanne would still hate my nonbinary ass for having had the absolute audacity to have been born bearing a penis. There's room for nuance here.