Yes and if enough people actually thought about it and cared then they wouldnt participate and the market would change. But instead just like with regulation they don't care. It's just one is forced and one is a choice.
An artistic show tend to have weirdly inelastic demand. If someone is a committed fan, they will typically pay any amount of money to "worship their idol" (not in a negative way, ritualized communal, artist performances are some of the earliest human traditions we have).
To see a society in which very few limits were placed on who could see a concert, look up Metallica playing when the USSR fell, absolutely massive.
