Blue zone diets

Curious what people think about blue zone diets? They are all very heavy in legumes, whole grains, leafy green veg, cheese, healthy fats and very low in meat. For example in Sardinia meat is saved for celebration days and Sundays, otherwise it is a vegetarian diet. Ikariams eat loads of black eye beans, lentils and goat cheese with a small amount of meat and a little fish. In the Okinawan diet less than 1 percent was meat, less than 1 percent fish and less than 1 percent egg or dairy. The rest was beans and veg. The Nicoya diet is only 5 percent meat, although they eat a lot of fermented dairy in cheese form. Finally, the only other blue zone of Loma Lina in California is described as a lacto-ove vegetarian diet. I'm not straight up arguing for a vegetarian diet here, I am not an absolutist... but it does seem that a largely pulse and veg based veggie diet with some cheese and in some cases a very small amount of meat is the best diet for longevity.

Sources: https://www.bluezones.com/ https://link.springer.com/chapter/10.1007/978-3-030-81758-9_2 https://journals.sagepub.com/doi/abs/10.1177/1559827616637066 https://www.bluezones.com/2017/05/okinawa-diet-eating-living-100/ https://m.nutritioninsight.com/news/secrets-of-the-loma-linda-blue-zone-diet-centenarians-good-nutrition-habits-and-whole-foods-as-key.html