[joe_the_user]

"But as humans we want to find not just what happened but who's at fault."

Well, guilt may well be a necessary concepts for a variety of social, institutional and psychological reasons. To say that guilt is must exist simply because of our humanness seems very much like the simplification that article gives some enlightening (imo) Wittgenstein quotes on:

"Our craving for generality has [as one] source … our preoccupation with the method of science. I mean the method of reducing the explanation of natural phenomena to the smallest possible number of primitive natural laws; and, in mathematics, of unifying the treatment of different topics by using a generalization. Philosophers constantly see the method of science before their eyes, and are irresistibly tempted to ask and answer in the way science does."

Also, Wittgenstein is certainly not arguing for science replacing philosophy but arguing for philosophers not to emulate scientists.