I think it wouldn't have been so bad if they had asked in a more appropriate way! "I don't do chopsticks" is a bit condascending!
My husband is a Californian, but at least he tried to use chopsticks and knows he can't and politely asks for a spoon and fork. If there is none to be had, he will attempt to stab the food with his chopsticks
I've tried to teach him, but it just won't work!!!