>> it's obviously preferable to get paid for the entire tour on the day it's announced
> it's only obvious to "private equity" type people.
No, it's obvious. Anyone that has to choose between getting $100 right now or $100 trickled in over months would opt for it right now for many reasons (inflation, the ability it invest it, the ability to use if it needed for unexpected situation, etc).
Wanting events to be populated by people that are primed for an experience and part of that priming bing they don't feel like it was too expensive to go might be another thing the artist or venue wants to encourage.
You can combine these things and make specific trade offs, but that doesn't mean all other things being equal that it's not entirely obvious that you should prefer money now to later.
> So giving up (or even worse, cooperating) to scalpers is like selling your business to private equity - you get some money, they get some money, and your customers/fans are fd.
It depends, probably a whole lot more than you think. Sometimes fans like to know they can go to an event if they care enough. In a world without resale markets that would be entirely dependent on the artist deciding to play more shows, because once tickets are sold they're gone. Secondary markets provide liquidity.
Also, sometimes tickets are available for cheaper* on secondary markets than they were on the initial sale (and this was true even before Ticketmaster started changing prices as the sales went on). That's because brokers take on risk buy buying for an event when it's not entirely sure it will still have demand when it's the event date.
For example, I just went to Stubhub (because I'm not sure Ticketmaster's own exchange will allow you to list for less than sale price) and looked for events starting soon. I found a rock concert in Napa where the Orchestra tickets are cheaper on Stubhub ($94 for two) than on Ticketmaster ($115.40 for two). There are plenty of tickets still on Ticketmaster, and some brokers just want to but their losses.[1][2]
There are plenty of ways to look at reselling to make it seem horrible or to make it seem beneficial. It's neither, it's just a normal function of markets, and the more people try to prevent it the more weird problems we'll have. Want to fix ticket prices? Convince artists to take on risk by playing larger venues (which they might not sell out) or add dates (meanind some days might not sell out). Artists don't want to take on that risk, so we have resellers and higher ticket prices.
1: https://www.stubhub.com/zepparella-napa-tickets-5-31-2025/ev...
2: https://www.ticketmaster.com/zepparella-the-led-zeppelin-pow...