That only works with concerts because of severely constrained supply. There's only one Taylor Swift, and she can only perform so many times each year. Yes there's probably no shortage of artists in general, but they're not interchangeable (certainly much less so compared to airlines). The air travel market is, therefore, not nearly as constrained.

I dunno, ticket reselling might not be strictly better, but it seems unlikely to be worse and at the very least it would be nice to have the option of selling your ticket if your plans change. As it is, you generally either have to pay extra in advance for that privilege, or just eat the loss. Either way it's great for the airlines, therefore not great for consumers.

I'm imagining a website that functions like a commodity trading website that allows anyone to buy and sell tickets for a given airline/time/location. Airlines could buy back tickets if they wanted.