You literally don't understand.

The human statements are the baseline, right or wrong, and the AI struggles to maintain numbers over 80% of that baseline.

Take however often a person is wrong and multiply it: that's AI. They like to call it "hallucination" and it will never, ever, go away: in fact it will get worse as it has already polluted its own datasets which it will pull from and produce even worse output like noise coming from an amp in a feedback loop.