Schauber, though, presumably has in mind someone who loses some commitments only to find new ones. Perhaps not, but being incapable of strong commitment is not admirable, so the capacity for lasting commitment, if not such commitment itself, seems virtuous. To speak of trying to retain or regain a dying commitment is to recognize that one can be somewhat active in choosing one's passive comitments. Generally, though, Schauber does not speak in this way. However, in the sense of being useful and agreeable, I think that even such integrity is virtuous in some people's eyes.
People like and depend on reliability in others.
Unthinking commitment is not really admirable, and might be commitment to an evil cause. Still, courage and patience can serve bad purposes, yet they are virtues. Schauber's main answer to this seems to be that one might try to be courageous or patient, but that one cannot try to have integrity in the sense of truth to one's passive commitments. But if I find myself falling out of love with my wife, then there is no inevitability about my never caring for her again. Love can be cultivated.