That is true. Whether higher stakes* would give her more courage, I doubt, but it is possible.

( * It was not entirely clear until it was too late, if you look at the people who had nice things to say about Hitler early on. The number of people int he resistance during the war (as opposed to after the war, in retrospect) was not very high. I am not suggesting I would have been one of those who took arms against him).

Anthony Beevor's book Dresden has a good description of what happened to people who opposed Hitler.

The penalty for telling the truth about the state of your project is less than the penalty for defying Hitler, but the good done by telling the truth about the state of your project is also less than the good done by defying Hitler.

For most people the good done by defying Hitler isn't that great. One individual more or less doesn't make a huge difference.