The difference imo is removing the information from the source. Previously you'd use the source of the information to gauge how much you trust it. If it's a reddit post or a no name website you'd likely be skeptical if it doesn't seem backed up by better sources. But now the info is coming from an LLM that you generally trust to be knowledgeable. And the language it uses backs up this feeling.

The OP post is highlighting how incredibly easy it is for a very small amount of information on the web to completely dictate the output of the LLM in to saying whatever you want.