Gonna write a shorter reply because I’m on my phone and frankly too hungry to think, so hopefully it makes sense :-)

TL;DR I agree with you re: US culture being too selfish and independent for that kind of thinking. It’s something that has had my curiosity for awhile and lends to another argument I’ve tried to make - that when people say collectivist economic systems won’t work because humans are “inherently selfish,” I think they’re confusing human nature with cultural conditioning. I don’t pretend to know how to change that cultural conditioning, but I think it’s narrow minded to assume that because one’s culture is perhaps selfish, then humans are as well.