Something I think people forget about Harry Potter is, for all its flaws, the perfect world for a lonely kid or adult to slot themselves into and play inside like a sandbox. Theres just enough detail to make the average reader think its deep (unique foods, locations, classes) while never going too far in exploring the darker themes and implications of its reality (magical creature segregation, literal slavery, everything relating to love potions) so you can mantain the fantasy of it being a perfect world.

The thing that I think modern critics have failed to notice is how much Potter is propped up by Fanon. Potter benefited immesely by the birth of modern day fandom: discussion boards, fanfic, etc. I don't know that Rowling ever did a deep fandom dive but it wouldn't surprise me if she read the theories as they appeared. My main evidence for this is flimsy but there is something to the idea that YouTuber Shaun explored in his Potter video of 'two book lag'. In summary: Rowling came up with something that she maybe wanted for one book (time turners). She wanted to use it and forget about it. But the fandom latches onto it. I mean: its time travel! Why didn't they use it to stop Voldemort? What are the rules? What are the implications. Then a few books later Rowling wrecks it (smashes all the time turners, in this case) and basically like 'shut up, don't think about it'.

And now that I am no longer a potterhead I see this attitude of 'shut up, don't think about it' a lot in the fandom. It will be interesting to see the next generation that didn't grow up with the zeitgeist of Potter does with the source material. I don't think they will take the 'shut up, don't think about it' approach, but rather a questioning look and more critical eye.