Banning LLMs can result in shorter arguments. "Low quality" is overly subjective and will probably take a lot of time to argue about. And then the possible outrage if it is taken to social media.
Can it really? "You submitted LLM-generated contributions" is also highly subjective. Arguably more so since you can't ever really be sure if somethingi s AI generated while with quality issues there are concrete things you can point to (e.g. it the code simply doesn't work, doesn't meet the contributor guidelines, uses obvious anti-patterns etc.).
If you rtfa, you will find it's actually the other way around. The linked PR from the AI has "concrete things you can point to" like "the code simply doesn't work".
