Yuval Noah Harari is both exaggerating and perfectly on point. AIs don't design better AIs as they can barely code by imitation. But simulated relationships and mass deployment of story generation to any bad actor is a threat to democracy; it doesn't take a lot to imagine the Cambridge Analytica of GPT models.
https://www.economist.com/by-invitation/2023/04/28/yuval-noah-harari-argues-that-ai-has-hacked-the-operating-system-of-human-civilisation