I don't know why women work so hard, either. Men work for women. If modern women don't want men anymore, the motivation to succeed is precisely zero.
Sadly, since women (but not men) have a genetic inclination to marry "up", status-wise, and our society considers a college degree a mark of status, that means that millions of these young college-"educated" women will NEVER find a man that meets their "standards". I've also known ultra-successful career types who kept meeting men who ought to have been good matches, yet, somehow they just "couldn't" find any of these decent middleclass men attractive. They were holding out for men of their own "class", but those men are all dating 20 year old models. Oops.
I think you have summed up the article, and the problem. You say it better than I do. More higher educated women are demanding men more educated than they are,but there are fewer males who are better educated than females, not more.