they don't

- Okinawans eat pigs nose-to-tail as well as lots of fish

- Sardinians eat ham and sausages from the wild Sarda pig, along with goat and sheep milk + cheeses

- Costa Ricans on the Nicoya peninsula have always eaten poultry, fish, eggs, turtles and wild game. A 2013 study found Nicoyans eat more animal proteins (fish & meat) than other Costa Ricans

- Seventh Day Adventists in California in the 60's and 70's were big advocates of raw dairy

The whole blue zone thing having to do with eating fewer animals is a myth or flawed propaganda or both. Plenty of sources online to dig into, but most people just watch netflix so