I think the author forgets that there are quantitative as well as qualitative social sciences. An anthropologist like the author might think that ethnography doesn't have much to offer (though that seems dubious to me too, I'm no expert). But what about econometrics, item response theory work from psych, field experiments and "natural experiments" work from political science, network analysis work from sociology. Social science methodologists have contributed to a lot of the same things industry data scientists work on.