The current system isn't very fair to those people either.
Professional scalpers act like high frequency trading firms (some HFTs are ticket scalpers), and employ tens of thousands of dollars worth of computer equipment to get those seats before the poor rubes who hoped for standard priced tickets.
By contrast, an auction system actually levels the playing field by removing the technological advantage.
They don't have to run a Dutch auction specifically, other kinds of auctions exist too.
The technological advantage is meaningless though. Anyone wealthy enough can set up the same tech solution, so it's just as fair. The wealthiest get the tickets in both cases
The unfairness remains, in that who gets to go to the concert is decided by who can spend the most in going to it.
If fairness is what you care about, any auction system is irrelevant
It will maximise profits, but is not fair.
Other platforms do waves, split across time zones. That would distribute the load to prevent crashes.