But I also think that if a maintainer asks you to jump before submitting a PR, you politely ask, “how high?”
Unreviewed generated PRs can still be helpful starting points for further LLM work if they achieve desired results. But close reading with consideration of authorial intent, giving detailed comments, and asking questions from someone who didn't write or read the code is a waste of your time.
That's why we need to know if a contribution was generated or not.
It would be nice if they did, in fact, say they didn't know. But more often they just waste your time making their chatbot argue with you. And the chatbots are outrageous gaslighters.
All big OSS projects have had the occasional bullshitter/gaslighter show up. But LLMs have increased the incidence level of these sorts of contributors by many orders of magnitude-- I consider it an open question if open-public-contribution opensource is viable in the world post LLM.