Let's not get bogged down by the all cultures are not equal strawman. That is not at all the key point here. Amy Wax/OP's argument is problematic because it conflates very different things using a subtly disingenuous argument. She starts off by saying something completely uncontroversial: kids from stable marriages do well in school. But she then plays on the audiences implicit biases to imply -- but not explicitly a…
We must have read different articles because that's not what I saw - I think you're so focused on detecting a dog whistle that you're missing the key point being raised.
Values are race, gender, and class neutral. A value or system of values can be adopted by a person regardless of their race, gender, class, sexual orientation, etc. Values are the only way we can find common ground with others, they are the only way we can be unified as a society. Imagine a white supremacist. Certainly if his skin color was magically changed to black overnight he would no longer be a white supremacist. But that's not a possibility - a white supremacist cannot change his skin color. But he can change his values.
We all agree that a stable family life is very advantageous for children. Most often this stability is achieved via marriage. Examining it along this axis we can then say that bourgeois, pro-family, pro-marriage values are measurably better than others.
We can also imagine an inner city black who has a choice between two value systems - a bourgeois value system or a hedonistic "gangster" value system. Which value system should he adopt? The bourgeois one, as this one will have better outcomes for him, for his family, and for his community.
Now there's a possible danger here: that we assume that all inner-city blacks have a gangster value system. That by dint of skin color and geographic location a person must necessarily have a certain value system. So let's not make that error.
Additionally, I would be very surprised if a majority of inner-city blacks held to some sort of gangster value system. While I don't have the data or surveys on hand, I would assume that most of this population already agrees with and holds most of the pro-family bourgeois values.
If these bourgeois values are already widespread yet poor outcomes remain then we can't pin these outcomes on a person lacking correct values. There's another factor in play. It may be that bourgeois values are hostage to other social, economic, and cultural factors. That they might yet bloom into something positive but are missing other essential ingredients. Wax fails insofar as she assigns too great a weight to the impact of bourgeois values.