People can write horrible PRs manually just as well as they do with AI (see Hacktoberfest drama, etc).
"LLM Code Contributions to Official Projects" would read exactly the same if it just said "Code Contributions to Official Projects": Write concise PRs, test your code, explain your changes and handle review feedback. None of this is different whether the code is written manually or with an LLM. Just looks like a long virtue signaling post.