I Know, Don't Wish. Sometimes I Wish

Rosalie wished that she had not given Marcy the notebook trilogy to read. The young man in those books went to war, some returned intact or maimed. They would be where Marcy was now, and yet Marcy would know none of their stories. She wished that nature had installed a different system for people to choose their genealogy. But that's impossible, you can't unread a book. Just as in genetics, a segment of DNA can be edited out. What's the point?