This is an interesting piece and Peter Attia is an interesting fellow. Having graduated as an aeronautical engineer he went back to school to pursue a career in medicine.
I dont fall completely into the camp that carbohydrates are totally evil (I like chocolate too much) and I have also found that a ketogenic state is not good for my lifting or my hitting. I suffer an extreme loss in power. But my observation of friends and family is that they would function a hell of a lot better on a lower carbohydrate diet. It seems to me that just the mere act of cutting out refined foods would make a tremendous difference to the health burden they impose upon themselves and by extension the community at large.