The person you responded to accounts for uncurved classes in their argument, that cheaters in uncurved classes "inject false signal into the difficulty feedback loop".
If the average assignment grades are very high the professor will be inclined to make the assignments more challenging. Cheating disrupts the professor's ability to accurately determine how well their students are grasping the material and adjust accordingly.
If the average assignment grades are very high the professor will be inclined to make the assignments more challenging. Cheating disrupts the professor's ability to accurately determine how well their students are grasping the material and adjust accordingly.