That's fair, it might not be for you. In 'old school ML', for a binary classifier, there's the concept of Precision (% of Predicted Positive that's ACTUALLY Positive) and Recall (% of ACTUALLY Positive that's Predicted to be Positive).

It sounds like you want perfect Precision (no errors on specific Qs) and perfect Recall (comprehensive on general Qs). You're right that no model of any type has ever achieved that on any large real-world data, so if that's truly the threshold for useful in your use cases, they won't make sense.