It's simple, to me that is. For many years, life has revolved around gender roles, but times are changing now. 50 years ago, it would be considered odd for a woman to be something than a nurse or some kind of care, 50 years before that, a woman never even thought about work. Now, we are every bit as successful as men (in most cases, jobs, what have you), but we have been foundationally defined by gender roles. I suspect that social psychologists will agree that this will change over time. Another 50 years or so?