You argued the similarly subjective and poorly defined notion that students who cheat must lack an ethical core, which is why I decided to discuss fuzzy things

You argued the similarly subjective and poorly defined notion that students who cheat must lack an ethical core, which is why I decided to discuss fuzzy things like ethics rather than the obvious fact that they signed an academic dishonesty agreement. Why is violation of said agreement something that I should view with disdain/why does it say anything about the ethical core of the student?