People contain a shitload of falsehoods, including you, yet you assign varying amounts of trust to those individuals.
A chain of providence isn't much different then that person having a diploma, a company work badge, and state issued ID. You at least know they aren't some random off the street.
Education involves doing some fact checking and critical thinking. Regardless of the strength of the original source.
It seems like using LLMs in any serious way will require a variety of techniques to mitigate their new, unique reasons for being unreliable.
Perhaps a “chain of model provenance” becomes an important one of these.