Same problem.
The lack of accountability paired with the celebration of the "hero" are the problem. Not the fact of her testimony.
EDIT: Some people who have similarly testified acknowledged the part they played in the situation they later denounced. So, it is possible for the story to be told and for the teller to also say "I knew what was up. I said nothing. I did nothing. I'm sorry."
The book is mainly attempts to embarass Zuck (eg, he’s sweaty, he’s not good at Catan, etc).