Considering you usually have better salary with 2-4 years extra experience there is more to it than that. I guess universal daycare is a non starter in the US, and even though we have that here in Sweden women still opt to stay at home more than men, but that difference getting smaller every year. One of the measures says 30% of childcare days are used by fathers, but that is only paid time. The statistics for the unpaid time is usually a lot worse.