Inducing guilt in the target of the judgment is not the sole (or even primary) purpose of moral judgment, nor is it a necessary feature. That the target must be capable of experiencing guilt is not a necessary feature either. Do you disagree with any of this?

I am, in general, much more inclined to attribute unfairness to states of affairs than to people. Usually it's a state of affairs that people could potentially do something to alter/mitigate, though, so I wouldn't call a law of nature unfair.