We live immersed in an industrial society that highly values productivity and individualism. All we can say is that large organizations of people in these circumstances are observed to default to doing what's best for them, maybe because that's what they were raised to think.

Maybe in a welfare society centered around the community you'd see people naturally acting different.

That's without disputing the naturalization of an observation of state (people act this way so they must always act this way) which I think is also problematic.