Temporary escapism is reasonable. It is similar to the psychological defense of denial. Psychological defenses in the short-run are good because they keep us from severe anger or anxiety. In the long-run, if all we do is use denial or escapism, then this is not allowing us to deal with the heart of the problem, which is to heal from what happened. As an analogy, if you have torn muscle tissue in your knee, and this requires surgery, you are not healing the knee by denying the extent of your injury. To forgive is to face the reality of deeply unfair treatment, the dangers of resentment, and your need of healing.
For additional information, see Why Forgive?