Is there a question or no
I think that a good word for this would be "enthnocentrism": the belief that one's culture, or one's enthnicity is superior to others, or more important than others (even to oneself: so my culture is more important for me than other cultures: this also would count).
What can a producer gain by specializing? Absolute advantage
When someone specializes in their field, they being an expert in that subject. Absolute advantage is the ability of a person or group to carry out an economic activity better than another. If someone focuses on it and specializes in one area, they are more likely to create an absolute advantage in that area.
Because they want different for their child. They want their child to be able to be able to hear what they can't. And enjoy the many sounds of the world. The parents already know how much they want to be able to hear, and become sad when they find out their child can't either.
