You have to be very strong to do that, but in my case I wanted to remain true to myself...and it was very hard too, because it is irreversible.
I'm curious about the irreversible aspect. I am not sure that anything in life is really irreversible (except death I suppose!) People change over time, and a parent who is abusive during one stage may mellow and become much more tolerable in later years.
I know several child free adults who only occasionally talk with their family members. They have plenty of supportive friends who are their "chosen family" who they adore. They do not feel any sense of loss in not talking to their "blood family" more, because they have little in common with those people. If I told them that they had lost an "irreplaceable" relationship by doing that, they would say that any relationship between two people is irreplaceable and unique. A relationship with a mother or father is not any more or less unique, and can be less healthy in your world.
You can be loved just as much - maybe more - by friends who know and appreciate you, vs by parents who just happened to get pregnant with you without choosing your personality or genes or anything else at all.
Or is there a special "quality" to the love of a mother or father that no other adult could provide to you, that makes it important to have even if they do not approve of you or understand you?