I don't know how they could have worded it better. More detail about the author:
"Greg Stevens is an ex-academic and corporate mathematician who writes about science, philosophy, history, fitness, politics and the intersections between them."
So he's every bit as unqualified as Rhinehart.
"Greg Stevens, a lifelong diet and work-out enthusiast, is unimpressed..."
"...It’s all part of the cult of the amateur enthusiast."