It's not that they don't know it's bad, it's that fundamentally, they're not trying to help you. They're trying to match a probability distribution. And if there's lot of 1997-quality C++ code out there (there is!), that's highly likely what you're going to get.
If you provide high quality context, it's more likely to produce high quality code too - but it can also spiral into creating bad code if it accidentally starts off on the wrong foot. The more bad code you have, the more bad code it suggests. That's why I think it's very important to clean up the code it suggests, even if it's just cosmetically.
If you provide high quality context, it's more likely to produce high quality code too - but it can also spiral into creating bad code if it accidentally starts off on the wrong foot. The more bad code you have, the more bad code it suggests. That's why I think it's very important to clean up the code it suggests, even if it's just cosmetically.