Where high achievers claim the world to be fair, otherwise their ego will be hurt because it hurts to admit effort may not be worth it in the end.
Effort justification is a common psych defense to exams, otherwise its what they call cognitive dissonance. Because the best usually needed to work very very hard... so since they are great, it is not in their interest to blame the system for being bad if it worked for them, as the brain cannot handle 2 truths at once - and most of all, they don't want to devalue themselves in this job economy! Thus it ends up that the teachers often had the system work for them resulting in lack of understanding for those who struggle with it.