I also think you're seeing a fair number of _women_ who have found out firsthand how difficult it is to balance a challenging career with marriage and motherhood expressing concern that, at the stage her family is _now_ at, she'll find it hard to make it work.

Actually it's becoming fairly normal in challenging professions like medicine. Women with young children become surgeons, obstetricians, Professors of General Practice. Some of them have stay-at-home partners; some don't. I think most physicians would be offended at the suggestion that a woman with young kids somehow is less capable of juggling a challenging career with motherhood. She may wish to control her hours, but apart from trauma and disciplines like OBGYN that's not really an issue of capability- and that's even more true if she is aiming for a post with round-the-clock assistance funded by the state whether she has kids or not.