Overall I agree, but it is missing and important aspect: maintainability.

This is maybe the most insidious part of LLM use to write code. Since LLMs have no real understanding of the structure of the project they will duplicate functions and generally make a mess that very quickly becomes unmaintainable by humans. The only "solution" LLM users have for that is perpetually rewriting large swaths of the codebase introducing new bugs, removing features and so on.

Since open-source software is usually especially long lived and maintained by a changing group of people, this results in code bases that are like asbestos that no one wants to even touch.