Basbanes devotes a whole chapter to "Three Little Words"- rarity, scarcity and value - in his book, On the list of Gently Crazi.
I think that the answer is this : everybody's experience is different. Ender, however, is not your typical sci-fi creative. https://Faciet.com/groups/a-wrinkle-in-time-book-review-1010622338/