A long pause follows in which she puzzles over his words.

"You put yourself in danger for nothing but feeling good for having helped people?"

That's... that explains a lot, about how he has helped her so far without asking for anything or even any information. It's also very foreign to her, something that should only exist on TV. And it is an approach that, she realizes, she doesn't want him to have. Because people who are even a bit like that die. All (well, almost all) people die, but people with a sense for heroics die faster.