Some on this forum have got their family out so it's possible but I suspect the longer we are shunned the harder it is. How can a person come back from shunning a close family member for twenty or thirty years?
I think they will probably prefer to stay in than admit they were so vile to someone they gave birth to and raised. Or someone they grew up with, shared a bedroom with as children.
This is the evil thing this cult does. By telling people they are being loving shunning family they set them up for so much guilt when they realise it's all bs, they trap them possibly until they die.