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"Out of sight, out of mind" I believe is the phrase that is most applicable here. Gym hates being confronted by evil because he's a spineless coward that can't meet evil head on.
Had Gym been less of a coward he may have stopped students from being molested under his supervision.
Was that the same excuse he used at OSU? >

Well exactly- he considers it not his job to STOP evil from occurring- he is otherwise very happy to labor towards the promotion, expansion, and enabling of evils.