Happy Birthday, J.K. Rowling and Harry Potter!
This is probably as good a time as any to look back on one of the most inspirational things to ever come from Jo (and Harry too, in a way.)
And this is also as good a time as any to answer this question:
It’s probably not a question of whether an adult “should”, but any reader of any age who is curious to read it should try it. As for the magic…you can’t lose what you never had, right? So the magic cannot be “gone”. But a close-minded reader would certainly not gain anything from reading Harry Potter; however anyone who is open to the magic of stories will definitely experience it. 😏