Religious and too poor to eat meat.
Not exactly selling the idea of “strict vegan diet” to a bunch of people with enough cash for meat and incisors in their jaws.
You got any examples of cultures en mass with “strict vegan diets” because lentils taste delicious?
> The consumption of meat is more common among lower-income groups. Nearly nine out of ten people belonging to the poorest 20% of India's population eat meat, compared to about seven out of ten among the wealthiest 20%.[4]
> Religion also plays a role in dietary habits. Nearly all of the Muslim (99%), Christian (99%) and Buddhists/neo-Buddhist (97%) populations eat meat. Among Hindus, a little over three-quarters consume meat, while Jains and Sikhs have the highest share of vegetarians. Only one-quarter of Jains and half of Sikhs have ever eaten meat.
why does it matter why they eat vegan? they just demonstrate that its feasable.