That's wild. My experience has been vastly different. ChatGPT, Claude, Claude Code, Gemini, etc whatever it may be even the simplest scripts I've had them write usually come out with issues. As far as writing functions is concerned, it's way less risky for me to write functions based on my prior knowledge than to ask ChatGPT to write the entire thing for me and just paste it in and call it good.

I do use it for learning and to help me access new concepts I've never thought about but if you're not proving what it's writing yourself and understanding what its written yourself then I hope I never have to work on code you've written. If you are, then you are not doing what the article is talking about.