His main theory seems to be:
Too much blue light hitting the retina --> something something --> damaged mitochondrial function
He does not think that carbs are inherently bad, only in the presence of too much blue light.
Now why does he recommend ketosis instead of just limiting your bluelight exposure with f.lux + maybe wearing some orange glasses in the afternoon and while looking into computer screens?
That being said, i do think that blue/red light is something we should be focusing on more.
Bad things happen if you stare into computer screens all day