Provenance matters. An LLM cannot certify a Developer Certificate of Origin (https://en.wikipedia.org/wiki/Developer_Certificate_of_Origi...) and a developer of integrity cannot certify the DCO for code emitted by an LLM, certainly not an LLM trained on code of unknown provenance. It is well-known that LLMs sometimes produce verbatim or near-verbatim copies of their training data, most of which cannot be used without attribution (and may have more onerous license requirements). It is also well-known that they don't "understand" semantics: they never make changes for the right reason.

We don't yet know how courts will rule on cases like Does v Github (https://githubcopilotlitigation.com/case-updates.html). LLM-based systems are not even capable of practicing clean-room design (https://en.wikipedia.org/wiki/Clean_room_design). For a maintainer to accept code generated by an LLM is to put the entire community at risk, as well as to endorse a power structure that mocks consent.