For me the challenge is discovering how both my parents were emotionally immature even though they were highly intelligent. Self consumed with making money while advancing their careers. 

I can forgive them. I can set boundaries. However trying to correct and resolve both known and unknown personality issues. Which was caused by their irresponsible actions. Is the hardest challenge that I strive to overcome daily. Like cleaning a wild bird covered in sludge after a spill from the SS parents oil tanker.  

 Parent child interactions have so many nuances many can't even begin to resolve them. I'm glad you've made a conscious effort to forgive them and set boundaries. Some don't even do that and they'd cut them off.

I think everyone is different and I can't speak for every situation in one post, though, some mitigate conflict from expulsion which is no different than death.