You can see how that is a narrow selection though? Men and women don't remain 'similarly situated' throughout their entire careers, particularly when you factor

You can see how that is a narrow selection though? Men and women don't remain 'similarly situated' throughout their entire careers, particularly when you factor in child-rearing (paternity still being highly uncommon, and few countries offer it as a social benefit). In in simplest form that is like saying "the pay divide between women and men is non-existent when women are effectively men."