I think we humans can take a beating before getting too sick. For example, I ate McDonalds here in China everyday for a year before meeting a McDonalds exec in a bar. He told me the most horrifying stories of bacteria that made me think that eating at McDonalds in China should have killed me, but it hasn’t. Things are the way they are because of money, and sure, they’re not deadly. But I often feel terrible after eating on an economy class flight, so I personally don’t eat on those flights anymore.