What about the example of driving a car with manual transmission? (I admit that's not the most relatable thing everywhere in the world, still). I'd argue most e

What about the example of driving a car with manual transmission? (I admit that's not the most relatable thing everywhere in the world, still). I'd argue most experienced manual drivers are good at it when we talk about normal traffic (where the skill ceiling just isn't very high). Try and ask a manual driver when/how they shift. Maybe they will give you rough speed numbers, but that's not really how they do it. Despite knowing very well when they have to shift in their own car, they won't be able to articulate/communicate it in a helpful way. It's become muscle memory guided by sound, haptics, speed perception and timings. Your clutch and transmission will let you know the difference between good and bad very clearly. You practice "good" a lot. You know how to do it. But you can't articulate it. One could argue that the scenario in question precludes the possibility to "excel". But the striking difference between "new driver learning a manual" and "experienced driver shifting without spending even a sliver of conscious though on it" is a clear separation of "bad" from "good" (not just "mediocre") and should suffice as counterexample to "if you can't articulate it, you're mediocre".