Say that with confidence now. You'll say with shock and incredulity later, "It can be fix? Right?!?!" (Cue some meme). Reproducing bugs is often hard for well designed systems. For randomly designed systems, it's a nightmare.

Fixing software is hard and fixing bad software is harder and fixing software where you didn't even think at the time how to make it maintainable is hardest.

Legacy systems are usually systems that were well designed at the time. That's why it's worth fixing them now.

--> And none of this is saying AI designed systems are bad. But if the only criteria is "code is deterministic by default, it works and we can fix problems later" then AI seems likely a terribleness accelerator.