You are absolutely correct. There is so much nonsense about writing for certain audiences. I note how some people disparage 'The Stranger" as high school material. I wonder when Camus wrote that book whether he thought it would even be taught in high school. The same is true of Buck's "The Good Earth," and Steinbeck's "Grapes of Wrath." If you deliberately target teens, you run the risk of talking down to them.
"Kids do not appreciate subtlety in adults when they are trying to understand something." Stan Morris
Books: Surviving the Fog, Surviving the Fog-Kathy's Recollections, Sam's Winnings, Kate's Movie Star, Amy's Hero, Sarah's Spaceship Adventure, and The Colors of Passion and Love.