Our whole education system is setup as a skinner box for grades. People finding tricks for better grades are massively rewarded. Study methods are optimised for recall within a month. And educators are accountable only to the measured outcomes.
Very little of the designed system of education is aimed at teaching. Most of it is aimed at measuring and certifying. Treating students as adversarial grade maximisers will likely teach a lot of them they are expected to grade maximise adversarially.