> The worst dev on my team uses ChatGPT a lot, and its facilitated him producing more bad code more quickly.

This is great. The exact same is true with writing, which I think it's trivial for anyone to see. Especially non-native speakers or otherwise bad writers can now write long-winded nonsense, which we're starting to see all over. It hasn't made anyone a good writer, it's just helped bad ones go faster.