One of the most common examples of smart contacts is a reversible transaction with dispute resolution by a third-party.

Infact you could implement exactly what you suggest in a similar way.

I'm sorry but I'm big into crypto and have never seen a contract like that deployed in the wild.

And I actually use crypto for payments more than most people. I used some just last week to buy a replica rolex from a chinese dealer because they gave a better price than credit cards.