Theatre:
Long before anesthesia was used for surgery, surgical procedures were gory and often filled with screams of patients. This spectacle was often witnessed by many (sometimes even with a musician playing) and was nothing short of a dramatic performance in a theatre. No prizes for guessing why was it called operating theatre.
Watching professionals from surgeons to sportsmen perform to an audience has often been fastest way to absorb skills by others. But many professions are not performed in large audience making the learning process slower.
Imagine if you could see best sales guy in world sell, or best CEOs take decisions, or best founders start a new company, or best teachers teach their students, or best coaches train or best philosophers argue.
Showing off is ridiculed. But maybe it’s fastest way to spread lessons.