[nql]

The direct participants in the justice system are not the whole picture. Society is not just affected by the judgement against the defendant, but by the logical precedent of the judgement. Making fair and consistent rules has widespread impact, allowing other people to understand the consequences of their actions and respond accordingly.

A deterministic universe does not mean people do not have moral agency. It just means some people are predetermined to behave immorally. That does not mean we should not do what we can to prevent that behavior.