I've had this issue too, and I feel it was an important lesson—kind of like the first time getting a hangover.

On the other hand, LLM-generated code comments better than I do, so given a long enough time horizon, it could be more understandable at a later time than code I've written myself (we've all had the experience of forgetting how things work).

It's not. Invariably, the code is locally fine and globally nonsense.