I think the author hit the right notes here; we do know how best optimize learning for high marks at a classroom-level, we do struggle with improving outcomes for students who need extra help, and we do bore students to tears when they outpace their peers. Over their lifetime of schooling, students regularly a standard deviation above or below subject-matter-expectations do breed resentment for the parts of the institution that inconvenience them, and we would probably do well to fix that if we want to avoid ending up recreating "Idiocracy" from first principles. I wish more folks were more reflective on their own opinions like this.