well like i said in my first post

they admit it...only to criticize it. it's just like "nuclear family privilege". basically all the data points out that having a nuclear family is more optimal and leads to much better results for children. since this (a) flies in the face of progressive ortodoxy that promotes/defends the more optimal behaviors and (b) would assign blame to those who choose the sub-optimal path for the outcomes of their progeny, they attack the superior behavior as "privilege"

just like this article. he's arguing "well better culture leads to better outcome, but that means that we shouldn't support/proliferate the culture and you're bad people for caring about your children and taking steps to ensure they have a more likely positive outcome." progs like this admit there are distinct cultures AND that one culture leads to better outcomes, but they have to use mental gymnastics to describe the differences in terms of exclusion.

now this argument can work with factors that are not malleable, like race or sex (sorry gender). if a culture/society is legitimately racist or sexist, then we can exclude people for things they literally cannot control. however, when we talk about culture, it's 100% adoptable by anyone so this argument is completely misguided. as i pointed out earlier, even the "ingredient/food" class signaling is a non-issue because of cell phones. information is more available and cheaper than ever, so you can't even make the "information proliferation" argument.

basically this is like gentrification. they want an impossible system. they want to defend/support lower class culture as some sort of ideal while expecting the results of non-lower class culture. the last thing progs want to do is admit that the culture they've helped establish and continue to defend is a major reason why poor people stay poor. that would make progressives monsters (and possibly racist/classist as frick) AND remove the "boogeyman" of the white, well-off conservative. if they lose the argument that the boogeyman is TAKING from the lower class and the story that "the upper-middle class is achievable if you adopt cultural valuesof the upper-middle class", then progs lose their power, meaning, and purpose