No. A strange way to interpet their statement! Almost as if you ...hallucinated their intend!
They are arguing that humans also hallucinate: "LLMs much like humans" (...) "Just like your doctor occasionally giving you wrong advice too quickly".
As an aside, there was never a "pre-scientific era where there [was] no way to measure truth". Prior to the rise of modern science fields, there have still always been objective ways to judge truth in all kinds of domains.