You simply do not understand at all or you think you know better than Christ and His Church. The Church may declare in good faith that a valid marriage is null if it is deceived by the spouses. The declaration is not absolute but only conditional, God knows the truth of the matter and He cannot be deceived. I might remind you that Civil Courts also declare marriages null and void as opposed to granting divorces. It is sad that your cynicism prevents you from comprehending the distinction. Still as you make up your religious beliefs on the hoof it is not surprising.