Similar use cases of useful AI one-shot projects are: demos, proof-of-concept, prototype, exploratory tests, etc... I've AI-generated an HTML/javascript craplet to test how browser security would behave for certain JavaScript API calls. I just wanted to confirm how browser security would behave before I started to spend time hand-coding the non-AI quality software that I wanted to release.

And I say this as somebody who generally has a low opinion of AI generated code and rarely uses it. But it has its place.