> I don't understand why educated people expect that an LLM would be able to play chess at a decent level.
Because it would be super cool; curiosity isn't something to be frowned upon. If it turned out it did play chess reasonably well, it would mean emergent behaviour instead of just echoing things said online.
But it's wishful thinking with this technology at this current level; like previous instances of chatbots and the like, while initially they can convince some people that they're intelligent thinking machines, this test proves that they aren't. It's part of the scientific process.