Tickets generally are dynamically priced. If a ticket has high demand it will instantly sell out and be put up for auction on resale sites.
The GP was trying to explain why airline tickets, but not consumer goods, are dynamically priced when sold by the original vendors.
[0]: https://help.ticketmaster.com/s/article/What-are-Official-Pl...
It's at least possibly bad for long-tern business. And in the case of small businesses, the owners may just not want to be that person.
For events, "list prices" are often gotten around by (in addition to ticket brokers being a thing) by various types of VIP seating, extras, and so forth which raise prices to closer to market levels while leaving normal ticket list prices--assuming you can get one.
Popular concerts sell out very fast and are immediately being sold on stubhub. Not all of these tickets sold on stubhub are actual resales by consumers or scalpers, but are typically mass purchases negotiated by ticketmaster ahead of time.
Superfans glued to artist social media will get special promo codes which unlock tickets that are not otherwise available. This makes sense because they are the most likely to spend the difference on merch.