In superhero fiction, for instance, the more intelligence there is, the less room there is for exciting and thrilling struggle, for throwing around flashy powers while you keep the reader on the edge of her seat, for literary conflict. [...]

The more intelligence the characters in a story have, the faster the outcome becomes a foregone conclusion [...].

Is a chess/go game between two brilliant players less exciting and dramatic than the one between two beginners? Is a fight between two expert fighters boring compared to a fight between two clueless ones? I'm not sure. It can be harder to follow. But it often will be more tense and it will have more potential for cool and fancy stuff. High skill is impressive all by itself. If you can't make a struggle between a brilliant hero and brilliant villain feel exciting and dramatic, I think it's because your imagination might be lacking or because you're not thinking hard enough rather then because such struggle is inherently boring.