My understanding of the parent is more charitable: If your thinking process relies on being told only the truth, you are going to fare lousy in this world.

LLMs are an example, but so are random pages on the internet, a buch of stuff we get served by the media (mainstream or otherwise), "expert opinions" by biased or sponsored experts or experts in a different field, etc, etc.

As the popular quip goes: It ain’t what you don’t know that gets you into trouble. It’s what you know for sure that just ain’t so.

With LLMs, we actually do get the warnings: Here's the ChatGPT footer: ChatGPT can make mistakes. Check important info. For Claude: Claude is AI and can make mistakes. Please double-check responses.

Such disclaimers, if written, are usually hidden deeply in terms of use for a random website, not stated up front.