Earlier quoted context omitted.
That's a very narrow view of culture, and wrong. Culture in some PC sense might be defined as only those things that are cute. But peoples differ greatly in important ways. There are real differences in family support, work ethic, dedication. Sorry if that seems offensive.
>Sorry if that seems offensive. It seems groundless and silly, rather than offensive. Examples of cultures that lack family support, a work ethic, concentration, or dedication would make your case.
In fact you have to be blind to not see all of this. Blinded by some touchy-feely wish-fulfillment dream that somehow we'd all get along if we just quit {whatever implausible scenario you want}. I suspect at root its the feeling that we'd all get along if we were all just like me.
But we're not all just like, well, anybody. We're terribly different. Get over it, deal with it, and learn to get along anyway. That's the answer, not blinding ourselves to the astonish variety of ways human societies work (or don't work).