The criteria was that is was the best job available in the world's wealthiest country, not that it was palatable to a someone living in a very poor country plagued with issues much lower on Maslow's hierarchy
I don't know why you think the average tenure across FAANGs is 2 years but it no doubt varies heavily by company. As another comment mentioned, Google has notoriously good WLB, and any individual team will be more predictive than the company as a whole. You'll hear plenty of "first-hand accounts" of high-pressure work environments because hundreds of thousands of engineers work at those companies!