Agree whole-heartedly with this. A well-crafted story is a well-crafted story regardless of its target demographic. There’s a lot of dross in Young Adult and children’s fiction, but the same is true of adult fiction. It is more than possible to read plenty of ‘grown up’ books (whatever is supposed to qualify) and also dabble in books aimed at other ages or about characters in other age groups.
I remain unashamed of my love for Rick Riordan novels.