She says 'You don't know what brings a person to a book', and it's taken very seriously, almost like a priest or a doctor. A librarian would also likely die by torture before they'd divulge someone's reading history.
Madness string 102453
I guess being extremely easy to lie to circles all the way back around sometimes. Because I'll just take it at face value and be like... 'uhh, but you definitely said that, did you not mean that?'