it's all an aesthetic experience, no? for the live entertainment business, it is aesthetically important to fans of Bruce Springsteen that his tickets have a number on them that appears on a website that feels good, and that number happens to be "price of ticket," even if hardly anyone is actually paying that number - they are usually paying more.
personally, i don't think any of this legal shit matters. the sherman antitrust act is 1 paragraph long, so it is flexible in terms of how you want this stuff to work, from a, "I would like the world to work as though it were governed by a priesthood" point of view. so it's reductive to talk about, what does the law say? very little of interest.
how should it work? live nation should be able to do whatever the hell it wants. it would make more money for everyone, at the cost of nothing. it would be good for the music industry to make more money. apple should not have lost the antitrust case over books either. nobody forces you to go to concerts! if you have a problem with ticket prices, make tiktoks complaining about it targeted at the artists. stop listening to their music. but IMO, the live performance cultural phenomenon, it doesn't benefit from this kind of regulation.