That's a problem that precedes llms. There used to be information online but it was normally informed. Since the social web, blogs, reviews, business reviews, Google reviews etc etc are packed so full of junk and nonsense that they are unhelpful.

The hope of the internet was to make information available to all. Spread ideas. Instead we as a species spread vapid half thoughts that drowns out the useful. LLMs are an extension of that and likely will make it much worse. But they can also be used to filter it.

The question is who decides which data is accurate and how do we verify that with these black boxes that are poorly understood by most of us.