I think it is sort of a way for her to have no expectations of herself, or where things will go. In other words, by saying that, if things don't work out, it is because she never planned for them to, and she doesn't fail. If they do work out, the whole statement doesn't matter anyway. So, she's protected, either way. That's my take. Of course, hers could be totally different. And we are not talking about a conscious thing here. She doesn't know she's doing it.
