A piece of human-written content and a piece of AI-written content may have similar value if we cannot distinguish between them. But if you can add the information that the human-written content was written by a human to the comparison, the human-written content becomes significantly more valuable, because it allows for a much deeper reading of the text, since the reader can trust that there has been an actual intent to convey some specific set of ideas through the text. This allows the reader to take a leap of faith and put in the work required to examine the author's point of view, knowing that it is based on the desires and hopes of an actual living person with a lifetime of experience behind them instead of being essentially random noise in the distribution.