I completely agree: Role models are really important. That's why we should try to highlight the achievements of some of these women in these non-traditional fields, and show how they have been able to choose some very prominent positions and do so while balancing work and home life. These women are not fully career women. We all have families, and we've found a way to balance and make it work.
Role models are really important, and I've heard that from young women who've said that they had seen what I or other women have done and been inspired to go into those types of careers.
Mentors are important for the same reason, people who will work actively with young women to help mould them and help teach them.
Lastly, I think the idea of the champion is really important too. It's not enough to have a mentor, but having somebody within your own organization who is actively promoting you as a woman to get that opportunity is very powerful as well.