Found in 2 comments on Hacker News
tfang17 · 2022-11-17 · Original thread
Read the book Ticket Masters. Explains how they've basically formed a monopoly via their merger with LiveNation - Ticket Master controls all major venues and thus all ticketing systems.

pcarolan · 2022-10-21 · Original thread
Ticketmaster's primary value prop is a heat shield for artists. The artists get to blame Ticketmaster while charging the highest market clearing price, and Ticketmaster gets to make a nice profit being the 'bad guys'.

If the status quo was really a problem for the big artists (not all) then alternatives would emerge.

If you want to learn all about it, this book does a good job:

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