Then why are we using them to write code, which should produce reliable outputs for a given input...much like a calculator.
Obviously we want the code to produce correct results for whatever input we give, and as it stands now, I can't trust LLM output without reviewing first. Still a helpful tool, but ultimately my desire would be to have them be as accurate as a calculator so they can be trusted enough to not need the review step.
Using an LLM and being OK with untrustworthy results, it'd be like clicking the terminal icon on my dock and sometimes it opens terminal, sometimes it might open a browser, or just silently fail because there's no reproducible output for any given input to an LLM. To me that's a problem, output should be reproducible, especially if it's writing code.