Doing coursework and showing up for class, is not 'compliance to authority' - it's just the process - and fyi voluntarily chosen by the student in most cases.
In most schools you don't even have to show up or do much frankly, you can just 'write the final' if you think you're a genius.
The workload in most programs surpasses the ability of 'just smart' folks to wing it, and so grades are definitely a measure of conscientiousness behaviour in the student as well as intelligence.
After 20 years of hiring I will take the 'good grades, reasonably bright' student, who was diligent and conscientious over the possibly genius person who didn't do much. 95% of even eng. work requires diligence, competence, focus, the ability to work with others, assumption of responsibility and a hint of leadership. I've never once seen a 'genius move' in my entire career where the totally brilliant dude made the difference. Maybe in some highly specific R&D things, but that's rare.
I should add: that 'someone is good at University' doesn't make them a better person, it doesn't make the more creative, moral, more suited to a whole host of things, it doesn't mean they're geniuses etc. etc.. It mostly just means they are 'good at University'. Which might happen to be a good benchmark for 'good at being a white collar employee'.