I agree with you, but concert tickets was a bad example, as that is easily centralizable. My go-to example to make people have a grasp of the type of problems this solves is games.

Imagine there was a store where you could buy games and activate them on any store you want to by only paying a small fee, for example you buy the game on that store and can activate the game on Steam, Playstation and Xbox only by paying the fees on each of them. This would allow people to essentially cross-buy games which is good for customers as it means they can move platforms or stores easier, it’s good for game devs because their games would get more views across the board and their percentage is clean, and it’s good for the stores because they get a clean cut of the cake when someone wants to activate a key.

Why can’t this be done with traditional methods? Because there’s no central authority on who owns a game, Valve has no reason to trust Sony and vice-versa. And even if you propose creating such centralized authority others might not trust it. A smart contract is transparent and auditable, requires no trust from any party and acts as a decentralized source of truth.