The idea of 30 million piano-playing Chinese isn't important because we need piano players. It's important because the fact that someone can take piano lessons

The idea of 30 million piano-playing Chinese isn't important because we need piano players. It's important because the fact that someone can take piano lessons implies a certain level of economic status beyond day-to-day survival. It implies a growing middle and upper class. Those implications lead to the conclusion of much larger markets, which leads to the idea of more wealth creation resulting from people filling those markets.