That doesn't refute his argument.
> yeah, those carnivores consume so much carbohydrates!
Fresh raw meat actually has a good amount of carbs. The muscle glycogen (animal equivalent of plant starch) starts to turn into lactic acid after death, but it's there for a carnivore that immediately starts eating after the kill. Also carnivores have jacked up gluconeogenesis. Carbohydrates are vital for carnivores who need to use anaerobic energy system to catch prey. They might not be vital for coach potato ketoers.
People usually claim that Inuits somehow survive without carbs but that's not true at all. Inuits are eating 15-20% of their calories as carbs in the form of muscle glycogen: https://academic.oup.com/ajcn/article/25/8/737/4733245