The case of the original error message does not really match what Feynman was concerned about. The original error message was not too simple, but its first part was some hocus-pocus that made (almost) no sense -- the less, the more the reader is a layperson. Only an expert had a chance of guessing the explanation. In the quoted passage, Feynman instead was concerned about popular accounts of science that are not useful for the reader -- not because they are unintelligible or wrong, but because they are too simplistic and provide too less information.
