It’s also possible that older couples in the new study come from a generation in which men and women generally knew less about each other to begin with than cou

It’s also possible that older couples in the new study come from a generation in which men and women generally knew less about each other to begin with than couples do today, Hertwig says. How is this not the more-believable hypothesis to draw from the study's results? Is it that it makes for a less interesting headline?