Is forgiveness a necessary part of healing?

This is an issue I think about a lot. Let’s say you’ve been abused – either sexually or emotionally – as a child or an adult. Conventional wisdom – and I’ve read it on here too – seems to assert that you must reach a place of forgiveness for your abuser before you can recover fully. It has seemed to me that there might be a case made that holding on to some anger (if not murderous rage) might be the healthier adaptive approach. Your thoughts?