> With handwritten code, the humans know what they don’t know.

I find this often not to be the case at all.

Let's put it this way: the human author is capable of doing so. The LLM is not. You can cultivate the human to learn to think in this way. You can for a brief period coerce an LLM to do so.

True, but IMO irrelevant. "What could have been" (capabilities) is just another "if only..."