That's a very reasonable question. My understanding of the vow --- my vow, my husband's vow--- is that if one of us did something abominable in the other person's eyes (I think of the A words: Abortion, Abandonment, Adultery or Abuse) then the couple can live apart from each other, but the guilty party has to try to repent, and the innocent party has to pray for, and hope for, the other person's repentance,and the eventual restoration of the marriage.
That may seem difficult; but that's what the promise is.
Maybe its my training as a lawyer but I don't see what you prescribe as implicit in the marriage vow.
I think as a practical matter, one spouse saying 'Get lost' is all it takes (and that does not necessaily have anything to do with the As you mention). How can a person be expected to stay married to someone who doesn't want to be with them, and at worse, wants to be with someone else?