The musical performance example is just one example. The general problem of services being resistant to increased productivity, however, is not restricted to this somewhat unique case. That's why I pointed to medical advice and education: when I need a medical consult or personalized tutoring, I don't specifically care if I have to lock down irreplaceable moments of another human being's life in order receive them.

It's misguided to focus on one special case of the cost disease problem where human by definition must provide the services, when most of the time this is not the case.