Yea they def all eat meat but I’d be interested to understand the actual proportions. It’s unclear to me. The official blue zone website itself says 95% plant based here: https://www.bluezones.com/recipes/food-guidelines/
Discussion
But then again to your point supposedly the whole blue zone thing is entirely a fraud itself: 
yes, it's a statistical grift combined with bad record keeping
The "blue zones" stop having as many centenarians after modern birth records start. turns out lots of people claim to have 100-year-old grandparents when there no documents exist to prove they don't


This took me down a very interesting rabbit hole. Thank you.