What lessons? The main character becomes a cop. The house elves are still slaves. The rigid caste system is never addressed, there's racism and classism, sexism is pretty apparent, there's veiled antisemitism.. the entire SYSTEM that allowed the villain to rise never actually gets dealt with.
PROMOTE POTTER & the lessons therein! eschew her shallow outlook. Let her know what she made will do more to undo her own bigotry than she can do to resist it!