So the Harry Potter series is largely aimed at children. The first book came out in 1997, the very year that I stopped being a child. That year, I was reading military fiction like Tom Clancy and Cosmos by Carl Sagan. I still don't have time to read all the books that I want to read, let alone the books that everyone else reads.
Now, some day I might have kids. They might want to watch or read Harry Potter, and they might want me to read or watch it with them. And I might weep many tears for what I have missed out on all that time. But kids like to watch stuff again. And again. And AGAIN!
So in the mean time, I will enjoy books meant for mommies and daddies who love each other. As far as I know, Harry Potter doesn't receive a blowjob from a blue-skinned chick. As far as I know, Snape doesn't eject entire families into space for celebrating the wrong holiday. As far as I know, Voldemort doesn't develop a weapon that melts a planet's entire crust and makes it as smooth as a giant cueball.
As I understand it, the Harry Potter series does contain World War II allegory. So there might be some overlapping appeal between JK Rowling's series and my novel.