So only rich people should be allowed to see major artists in concert?
It's just a system where people are incented to pay the most they're willing to. Pay before your price and you lose money, pay after your price and you risk the show being sold out.
Maximizing long term profitability is often not the same as maximizing short term revenue.
Or you put some safeties in place and only the fastest ones can have a ticket
In capitalism, high demand and limited stock means that you (as a seller) should set the price as high as you can, while selling all stock. If you set your price lower, you're loosing potential income