I understand the frustration, but factually it is not true.
Engines are reliable to about 1 anomaly per million flight hours or so, current flight software is more reliable, on order of 1 fault per billion hours. In-flight engine shutdowns are fairly common, while major software anomalies are much rarer.
I used LLMs for coding and troubleshooting, and while they can definitely "hit" and "miss", they don't only "miss".