They're not as biologically determined. The presence of different cultures keeps life interesting (though there are some cultural norms that should be destroyed as soon as it becomes possible, relativism be damned). To put an extremely shallow spin on it, I'm glad that I can leave my apartment and find mexican food, italian food, chinese food, etc., and I'm grateful for all the different groups of people who found their own ways to survive and thrive in their own particular circumstances, and thus gave me these diverse cuisines, these diverse languages, these diverse ways of living and speaking and creating art and travelling. But because none of that is (all that) biologically determined, I don't see why the fact of my parents coming from particular places should inform my enjoyment of these cultures.