Its a false premise so often repeated. I am really tired. Compilers are ruleset: If you pass it one statement it'll produce the same output all the time. Its easy to verify it works. And if enough people have used it before and found no problems, there probably aren't many. Spoiler: People always find niche bugs.

But an LLM will generate you two completely different things today and tomorrow. Heck, even if you stash its changes and redo the same prompt.

They are NOT comparable at all.