That's the explanation when men get paid more than women.
When women are getting paid more than men, there are no known explanations beyond sexism. Especially at Google who notoriously fired Damore for stating that maybe men and women have different preferences - it's pretty clear from the article, biased though it is, that the issue here is really Google managers systematically awarding pay increases to women rather than men, in order to try and boost their numbers.
