Because of studies like https://arxiv.org/abs/2211.03622:
Overall, we find that participants who had access to an AI assistant based on OpenAI’s codex-davinci-002 model wrote significantly less secure code than those without access. Additionally, participants with access to an AI assistant were more likely to believe they wrote secure code than those without access to the AI assistant.
This appears to just be a compilation of other leaks: https://www.bleepingcomputer.com/news/security/no-the-16-billion-credentials-leak-is-not-a-new-data-breach/
Still not a bad idea to change passwords and make sure MFA is enabled.