Good, keep on eating carbs.
Didn't say that but eating sticks, twigs and raw meat ain't the answer either. From some of the skeletal remains, they weren't all that healthy.
If you are going to sing the praises of this diet you might want to consider how it might actually be consumed, why longevity is going up instead of down, and why the "carb" laden foods of the last 5.000 years haven't been a problem until now.
I can and do buy the refined sugars and over refined grains argument.
But the rest seems to be a stretch.
Still, whatever works.