I think because the stakes are relatively low. I mean, high stakes in that Harry is nearly consumed by the walking embodiment of depression , Sirius Black’s life (and Buckbeak’s life) are on the line, and Harry’s future life is dramatically impacted, but the fate of the wizarding world isn’t on Harry’s shoulders for once. His choices mostly impact himself. That and Rowling’s use of magical creatures to describe specific human emotional states is pretty awesome... boggarts (the personification of fear), can be beaten by banding together and laughing; Dementors (the personification of depression) can be defended against with really strong happy memories that magically turn into an animal that protects you (and even then, like, you have to have a lot of help to beat them off, and can’t always succeed; most wizards can’t cast Patronus charms). It’s so CLEVER, and it was one of the first times where I closed a book and thought about how the words on the page were working, not just what they were saying. Allen Liu describes close reading as taking a view from a window and then examining the window-- how it’s framed, how the texture impacts your vision, etc.-- and doing that, looking at that particular bubble in the glass that was Boggarts, and figuring out the pretty facile lesson that Rowling was Making a Statement About Fear using boggarts felt mind-blowingly brilliant to me at age 10.