The weak ones died in prehistoric times.
I agree. The study is flawed, because the weak children and women died early. Only the strong survived. 5300 BC is not that long ago, despite them saying prehistoric as if people were like apes back then. They weren't that much different. They were stronger because survival demanded it, and the weaker ones perished. Plus, a sampling of some 94 women going back 6000 years among a worldwide population of some 50 million on average (back then) is not a valid testbed for formulating a hypothesis as fact. This sampling could be dramatically skewed from the mean and has a high rate of error deviation.