There are a few populations without (much) staple carbs, for example the Inuit and the Maasai. But I don't think many people solely blame carbs. It's processed

There are a few populations without (much) staple carbs, for example the Inuit and the Maasai. But I don't think many people solely blame carbs. It's processed carbs and sugar, hyper-palatable foods, lack of sleep, lack of sun exposure, microbiome damage from antibiotics, and a ton of other lifestyle factors. But once you're in a compromised state (autoimmune, type 2 diabetes, hypertension, etc.), the ketogenic diet can be a very good way to treat or reverse those conditions. It doesn't mean that no one can eat carbs, it just means there are a lot of people who really do benefit from it.