Here's the secret to coding with an LLM: don't expect it to get things 100% correct. You will need to fix something almost every time you use it to generate code. Maybe a name here, maybe a calculation, maybe a function signature. And maybe you won't spot the issue until later.

You still "used" an LLM to write the code. And it still saved you time (though depending on the circumstances this can be debatable).

That's why all these people say they use LLMs to write lots of code. They aren't saying it did it 100% without any checking and fixing. They're just saying they used it.