That is definitely the essence of AI: It is the average of all the inputs it has been trained on.
Frank Zappa was once asked about guitar virtuosos like John McLaughlin and his answer was somemthing like "You can maybe plays solo faster than anybody, but can your playing surprise me?".
We see this with their GenAI music equivalents. All the music these GenAI models produce is exceptionally (aggressively, even) average.
It is the most polished average you'll ever find. Never awful (anymore), never fantastic. Just bang in the middle.