Look... do we say Beethoven was a lousy composer because he never conceived the 12-tone system or mastered extended techniques or knew anything about Indonesian music? How absurd! Those were all things for later composers to discover and specialise in.
Specialisation is just fine, thank you. It’s perfectly fine to consider oneself a good programmer!, having mastered only one or two languages.
Americans, please quit the silly moaning and self flagellation and get on with your day jobs. Thanks.