Farmers and other poor from China's interior make a different calculus.

Many move to the eastern parts of the country to work in those factories because they are a better alternative to what they have back home.

It's not all that different from kids in Podunk USA moving to bigger cities for better opportunities despite "the rat race" in cities.

If north America and Europe had not essentially outsourced their labor to China and India, we'd have two billion more people living in extreme poverty, burning wood stoves, etc.