This argument comes up a lot. The point is that with unreviewed AI nobody understood the code at any time (including the AI). This is completely different to a C compiler wherein the writers and maintainers deeply understand the code. This means that even though I don't understand it, I can use it with some confidence.

Your point about AI being another abstraction similar to the "mostly deterministic" C compiler also comes up often but there are many arguments against it. If you think the determinism of a compiler and an AI are similar then I'm not sure whether you know anything about how either of them work or have even compared examples of what they produce.