It's like self-driving cars. You might want to accept human fault error rates until we prove overwhelmingly that the software is near-perfect, but others might want to switch to a system once it proves that it reliably beats most humans by a large factor, then work to mitigate the common errors it does have and improve.

When management signs off on work (SOX requires CEOs and CFOs to personally certify the accuracy of financial reports), they do not personally 'verify that all the tariffs are properly allocated to the correct GL code' or nearly any other hard numbers. The world works with human-level best effort, and management of that risk. I'm sure additional checks will be developed to categorize that risk, but the entire field of finance is about analyzing and pricing in risk so I think it'll work just fine.