I think it's best for everyone to take responsibility for what he or she does. But there's no denying that it much more LIKELY that a child in a single-parent home will engage in more destructive and self-destructive behavior than a child from an intact family. That's just the plain truth. Evidently it is easier for kids to do well when they have all the resources (not so much financial as emotional) that being raised with two parents in the home provides them.
"More likely" is not 100%, it is actually not even highly likely.