It seems the author is taking the experience of Science PhDs, and realistically, a specific kind of Science Phd, and tarring the entire notion of a doctoral degree on that basis. US Universities grant PhDs in a wide range of academic disciplines across the Humanities and Sciences, and quite a few professions (Engineering and Education come immediately to mind). My children both have PhDs and academic careers (one as faculty in top-ranked University, and one as a research associate in the Health Sciences, an neither's experience is particularly close to that the author outlines. The author's one-size fits all criticism really doesn't fit all.
That's not to say there aren't abuses and inefficiencies in Science doctoral programs. Just that "Abolish the PhD" is the wrong rallying cry.