Yeah definitely. But "can you grind" is legitimate selection criterion for making it into the upper echelons. Not an ideal one, but it's not illegitimate.
You'd do just as well rolling dice, and it would be more legitimate because it wouldn't be pretending to do something it doesn't.
Can you teach yourself, broadly. Out of all the filters we have in education, this one might be the most legitimate.
Can you teach yourself, broadly. Out of all the filters we have in education, this one might be the most legitimate because it maps pretty closely to lifelong curiosity and learning.