I have personally been struck by how concerned people are with the declining birth rate, and more specifically, how so many women deem it impossible to combine work and have children. They have given up without even trying, which seems unrealistic and disheartening. More specific to your question, I think that women have been so conditioned to think of themselves as weaker and men have been so conditioned to think of themselves as stronger, and sadly, we have a hard time freeing ourselves from those expectations for ourselves. When it comes to military service, I think women are extra indulgent of this stereotype because they really don't want to serve. However, that belief, in my opinion, actually does longer-term damage to our assumptions about what women can accomplish. The few studies I have read about this indicate that women and men are different, but both have unique skills and important skills. They have done studies on firefighters and learned that women have unique strengths (lower body) that are just as necessary in fire fighting—different, but necessary. As to the point about birth—I, too, find that ridiculous, but I think it points to a larger issue, which is that what women do contribute is under valued, and so they are trying to claim that space through comments like the one you mentioned.