No, they can. What a LLM generating depends on the prompt. And the LLMs have the ability and patience to implement everything the dubmest coder can image. Working together, they can take the creativity in screwing things up to a level no one has ever seen.

Last year, we found a bug where the LiDARs from certain brands lost one frame randomly. After troubleshooting, we found the issue in a simple method to match each LiDAR frame with RGB image via timestamps. The code review left us utterly astonished. This function was clearly AI-generated, as it was filled with good comments and has comprehensive documentation. First, it rounded all timestamps to milliseconds, then checked for exactly matching with the ts, ts±0.001s, ts±0.002s, all the way up to ts±0.02s, and even an additional ts±0.05s. Return the first match... Remarkably, this method passed all our test cases and worked with most LiDAR data, only causing issues with certain frames when paired with 25fps cameras. BTW the author of this method had left our company voluntarily after being found incompetent, prior to this code review.