There are a million ways to express the fact of the hormonal backlash without including a quote that makes it sound like killing will improve your sex life.

In context, its correct, that's not up for dispute. The question is "does it add anything to the context?" and more importantly "could a student misconstrue its inclusion as something else?"

You'd think that, being so educated on the hormonal backlash from experiencing trauma, that cops and the greater judicial system would be more forgiving of e.g. emergent hypersexuality in rape victims after experiencing a rape that Grossman calls out there. But you would be wrong, because even if Grossman wants his students to understand that concept for their own health, he wildly misunderstands the culture he helped create where the police view themselves as a thin blue line holding back the manifold forces of Chaos Undivided.