Consider a nurse with a community college degree who calmly runs a code blue while the summa cum laude doctor freezes. If academic achievement proved superior intelligence, that doctor would have to be smarter, which is absurd on its face. And your own point kind of proves mine: you said intelligence is innate and comes in many forms. Exactly. Academic achievement tests one narrow slice: conformity, memorization, and turning things in on time. If that were the same as general intelligence, the best test-taker would always be the best thinker. But we all know that's not how the real world works. So academic achievement doesn't prove superior intelligence, full stop.