I think the main issue was with the "expectation" part. It carries an insinuation of being forced, or socially shunned, etc. There are choices being made, and choices aren't random. I don't really see expectations that a woman take a lower paying job playing into that very much. I can see more pressure on the other side - like for the man to pay for everything on dates, support their family, etc, with the resulting less pressure on the other side allowing the choice of work that is fulfilling in other ways (societal benefit, fun, less stress, flexibility). Even these roles are choices. A man could choose not to pay for dates, be a stay at home dad, etc. When it come mate selection, there is generally more pressure on the male than the female.