I understand she is trying to make a point about how difficult it is to be a parent, but she takes the study out of context. Of course it is easy to see why, since the title of the file, "husbands_stress_1" also singles out the male version of the study. When you read the article, you see that it is both sexes who suffer when taking on non traditional roles, which indicates not that keeping house is so much more stressful than working nine to five, but that taking on a non traditional role increases stress levels accross the board, resulting in a higher death rate for househusbands and for female executives when compared to their opposite sex counterparts.