Comic pretty much says it all, but I’ll reiterate:
a) As an author you MUST read the genre you write or you will have no idea about its norms, your author peers, or what’s going on in the world you’re trying to enter/already part of;
b) WTF dude books for younger readers are often GREAT. Nobody belongs judging someone else’s choice of literature based on perceptions of what’s age appropriate. If YOU’RE not interested, that’s up to you, but shaming other people for what they like to read is totally weird and unnecessary. Go away.