louis ck has been vocal about this issue.
if ticketmaster/artists sold tickets at the "market " value, then a significant percentage of fans would be locked out the market.
If Porsche made most of their money from branded apparel, they'd probably have a different pricing strategy.
Quite the opposite, if anything; the exclusivity of the halo product increases the (perceived) value of the merch.
Margin is very high on their cars, so there is no way they're making anywhere close to most of their money through branded merchandise.
Contrast that with the Music industry. They did about $15 billion in music sales, and only about $8 billion in concert revenue in 2015.
Musicians do make a significant portion of their money from concert revenue, but musicians aren't the primary drivers of ticket prices.