The owner of that NFT (ticket) can then do whatever they want with it without the need for a third party (Ticketmaster) to scalp the shit out of any subsequent transactions.

How is that supposed to prevent scalping, exactly?

Proof of ownership of a single ticket at the time of the event is the end goal, which is what NFTs do.

And that's better than physical tickets, because...?

What’s better, is if artists want to provide a subset of tickets that are not resellable they can.

That's also already a solved problem: write a name on a ticket and validate that name with an ID.