[That hurt, but it rings true. She knows she's probably an idiot compared to the like of the Doctor or River. And she probably would - has,/i>- end up killing if allowed to kill on her own. She knows she shouldn't care, but she does. She tries her best to hide it though.]
Well, so what if what you say is true? At least he manages to accomplish his goals without getting a whole load more people killed in the process. If I make a difference by doing what he says, then it's still good. He is a good person. Unlike some people.