Maybe they just mean Lisp, rather than LLM bullshit.
If you're talking about AI winter, it might be fair to put some blame on the commercial Lisp Machine producers, but I think it's indisputable that the early failures were due to capricious government funding as well as the non-existence of big, cheap GPGPUs.
Lisps existed long before any AI hype, and they'll happily continue long after.