Yeah, you are bring a little unreasonable.
I say this because I was like your daughter, at that age, but I was obsessed with Agatha Christie.
To be honest, I'm still like that now. I find an author I like and will read everything they have written; Martina Cole, Patricia Cornwell etc.
Are there better writers? Of course. But that is the great thing about being a reader, you read, you learn, you then find authors who are better.
I can see the similarities to people who watch TV series year after year, Eastenders, Coronation Street, Breaking Bad, Line of Duty etc.
Are there better TV programmes? of course, but if someone is enjoying it, let them be.