One of my favorite books on true crime was a forensic psychologist who partnered with a neurologist in evaluations.
Disruptions to impulse control or environmental factors that cause developmental issues with things like failing the marshmallow test can dramatically disadvantage people from being able to successfully stay non-offenders and instead succeed in modern society.
So successful AGI alignment that might reduce harmful actions by high double digit percentages might be as simple as adding a secondary "impulse control" layer to the stack that reevaluates proposed actions and predicts the consequences of such actions, weighing projected net benefits and costs.
A lot of people that do bad things aren't doing those things from a process driven by rational choices, and if we could successfully deploy AGI that is primarily driven by rational intelligent choices it would likely be better than humans in reduced crime propensity as well as the other things earning it the name of AGI.