So many people reading such impressive books and here I am reading Skullduggery Pleasant - a series about a skeleton detective who throws fireballs. It's not high art, but it's fun!
There is a fair bit of quality that can go into making a GOOD purely fun thing, and even when it's pure schlock there's no shame in that. Some times you want a steak, sometimes you want a burger. Both can be good or bad in their own ways, and neither is better than the other.