My oldest daughter is 24 and she and 2 of her 3 siblings were homeschooled.
Once when she was about 7 we were reading books from the library and she said, “Why doesn't anyone in these books look like me?”
My daughter has fair skin, very light blond hair, and bright blue eyes.
You couldn't find a book in the library featuring a girl with fair skin, blond hair, and blue eyes? My eldest son always has been a voracious reader, reading big books on his own at a very young age. There came a time when he wondered aloud to me: "I noticed all these characters look like you." (i.e. "white" skin, blue eyes, etc.) Think of all the most popular books. There aren't many books in which the main character is black, for example.