Basically adults 100 years ago and more had very different lives and doing hard labor and various things to survive day to day made them into something that is different that what the average adult is today. So many men today have low testosterone and basically act like women. Many women are very immature and emotional beyond even the normal amount that women should normally be based on sex differences. Even many people who exercise a lot and are in good shape would have a complete breakdown if they had to so much as survive sleeping in their car overnight or something.
We are essentially a society of domesticated beings rather than free natural humans. I include myself in this as well as I'm obviously a product of this sick society but have been working for years now to push myself well out of my comfort zone.
A woman can be both very smart, and immature and emotional. They are not mutually exclusive. Take my wife for example, she has an IQ at least slightly above average, and an amazing verbal IQ as she is a writer. (Good thing too, as the kids are smart since IQ is primarily inherited from the mother).
On the other hand, she is irrational about certain topics, unorganized, and sometimes completely child-like about something as simple as answering a direct question of "where do you want to go for dinner."
I'm not the only one to notice this, it's a long running thing that all civilizations have had to deal with.