Maybe you didn't read all of OPs comments, you're talking about petty stuff and OP is talking about abusers and co-abusers.
I guess I would tell you that not everything fits in the oversimplification in your comment.
My daughter will be better off without a full family of manipulative, controlling, and abusive people (or people who condone such behaviour).
After years of abuse I was glad my husband decided my dad's demand that he ask permission to marry me was too antiquated. The original conflict that caused this rift was years of abuse, and manipulation. I chose to burn bridges that needed to go. Otherwise I would never be free to make my own decisions about my own live without consulting with my dad at every turn.
Even if you had not read this comment I still think is crazy that you think it is go advice to tell people to go back and try to have healthy boundaries with unhealthy people, her family has been harassing her for 2 years with vindictive letters.