Forgiveness is a response to injustice and as such it never ignores justice. Instead, it is a response of mercy in the face of such injustice. To give mercy as a conscious choice when experiencing another person’s injustice is a heroic act of virtue, hardly a lack of courage.
When people practice forgiveness, they do not ignore justice, but instead give mercy and strive for justice at the same time. The justice sought is likely to be good because it is not mingled with resentment. Thus, forgiveness hardly is a cop-out. Did I convince you?