Look, I get that fundamentally this whole piece is a big "fun fact!" with a salting of genetics-as-destiny. But you can't look at America, at least, and think that people are putting too little emphasis on choosing neighborhoods to benefit their children.
Local funding of schools along with on-the-ground politics means that quality of public education varies wildly from neighborhood to neighborhood, county to county. Because parents believe this factor to be very important to their children's opportunities, US housing values are tied to this variability; parents will take on large amounts of housing debt to get their children into better schools, and this impacts prices so much that even non-parents are tugged this way and that by it.
This is incredibly messed up given that the entire education system is supposed to be for the public benefit, but we take for granted that it's parents' responsibility to scramble into the best class-segregated (and race-segregated) situation they can for the sake of their own children, and, uh, au-dessous de moi, le déluge.
In some sense, the title of the book from which this is excerpted gives away the game: "Don’t Trust Your Gut: Using Data to Get What You Really Want in Life." It puts "data" on a pedestal for instrumental use as though these patterns should provoke us to exploit them, as though you can neutrally talk about the opportunities of children without moral or political implication.
I say this as someone who herself is often enamored of data analysis: this framing is corrosive to the public good, and everyone involved ought to feel a good sight more shame than they seem to.