Yes, I read the article. I'm confused; is this supposed to constitute a rebuttal?

Research can have biases too.

Of course! Everything can have a bias - that's well understood. Just because something can have one, doesn't mean it does. If one finds bias in the research methods or data in the article - one can conduct their own study and submit their results. Ironically, the research from Cambridge talks about a bias in the original thesis of "BS jobs".