Not a US view, but it is similar overseas. In my country there are 2 main ticketing companies (of which Ticketmaster is one) and large stadiums are mostly owned by by state governments.

The state governments then sell exclusive supply rights to one of the two ticketing companies. The venue receives a share of the fees charged by the ticketing company.

You also have the ticketing companies owning the companies that are acting as promoters, meaning that 3 of the 4 main parties are financially benefitting from the arrangement.

Another point is that the band can use the ticketing company and promoter as a shield against their ticket prices. The band/promoter (its the promoter who I assume is working on instructions from the band) hold tickets back from the general public sale and then sell on the resale market to be able to take advantage of the higher price people are willing to pay while also being able to keep the face value of the ticket down.

Also, setting up said company would require a huge investment and logistical overlay and probably isn't worth the hassle to a band for a marginal increase in overall revenue. This is similar to the argument of employees and unions.

They don't pick an accent but pick up on an accent depending on where you learn English and consume most of the English speaking media.

Wife and her close friend went to school together in an Asian country. Her friend moved to England, wife USA and now Australia.

When they speak with me around there is a noticeably English accent, my Australian accent and my wifes neutral/American accent.

Yeah mate, we use Celcius to measure temperature in Australia.