I agree it's probably a minority who would put it in such harsh terms as the comment you're responding to, but the underlying sentiment is more a part of American culture than many other places.

For instance, the values of meritocracy and self-determination are deeply ingrained in the US mythos, beginning from "All men are created equal" and "the pursuit of happiness" in the declaration of independence.

Since moving to Europe, the difference in the concept of individual credit/responsibility is one of the largest cultural differences I have felt.