It's certainly possible to grow up without learning how to use chopsticks. I did and I grew up outside NYC and had my share of Asian food. But I never learned in large part bec no one ever showed me and in part bec there were always forks and knives were on the tables --why would I want to fight with my food if I don't have to. As an adult I've tried to learn and although I'm quite adept with my hands (I was a bridal seamstress/fitter, for one example), I simply cannot do it. DD learned when she was 6 and at nearly 50 I still cannot do it. It's not one of my big life worries, to be honest.
And where I live now? Let's put it this way, when we moved here 18 years ago (and keep in mind this is a big university town), our race was questioned because we both have brunette hair. Why? Because "white people have blonde hair." So I can pretty much assure you that if the natives think brown hair is so exotic that we cannot be caucasian, I can assure you that there are few natives here who know how to use chopsticks.