1. Bigger groups === more and better data. I didn't know anyone growing up who was interested in ketogenic or carnivorous diets, now it's much more common.
2. Huge difference between the diet of a westerner following carnivore and traditional tribal carnivorous diets
3. The Inuits weren't particularly healthy, I'm not sure why their diet matters: https://www.leoandlongevity.com/post/inuit-health
4. And most importantly, there's a lot of research showing that high levels of IGF-1 associated with diets high in red meat are not good for longevity: https://www.youtube.com/watch?v=AjSl4n_KdOY