You misunderstand the point of anullment. If a marriage is anulled, it is because the sacrament was never conferred on the person. It is not being undone. It never happened in the first place. If the finding is that the sacrament was conferred, then no anullment is permitted. I agree that it appears that anullments are given to easily to people like the Kennedy's.
“You misunderstand the point of anullment.”
No I don’t. It’s to get a divorce without actually calling it that.
How is one to know the validity of the sacrament one receives when it’s validity depends on future actions?
If one can receive a sacrament, yet not really receive it, none of them have meaning for the present, it’s only through the lens of the past can one discern whether a sacrament actually was received if one follows that logic.
Sacraments are not supposed to have a “fingers crossed” clause as originally intended.
So then, all those people are living in sin.
And by that reasoning, there's not a Catholic couple around who can be sure that their spouse entered into the marriage with pure intent and that their marriage is valid and that they're not living in sin either.