https://en.wikipedia.org/wiki/Wikipedia:Writing_articles_wit...

> Text generated by large language models (LLMs) such as ChatGPT, Gemini, Claude, DeepSeek etc. often violates several of Wikipedia's core content policies. For this reason, the use of LLMs to generate or rewrite article content is prohibited, save for these two exceptions

(The two exceptions are basic copyediting and translation).

I don't see how this is unintelligent and impractical. Wikipedia are trying to protect their core content policies ie. the very things that separate Wikipedia from Conservapedia, Grokipedia, RationalWiki or any other wiki. They are willing to grant exceptions in cases where LLMs are valuable.

And they even acknowledge that:

> Some editors may have similar writing styles to LLMs. More evidence than just stylistic or linguistic signs is needed to justify sanctions

So it seems like the ban is only intended to be used in extremely egregious cases.