You know, the first thing that came to my mind when I read this was the old argument that we can't have parental consent for any abortion because some parents might kill their teenage daughter when they learn she is pregnant.
I don't think anybody is denying that a marriage is invalid if the person you chose to marry turns out to be the Devil himself. But that is not the case in the vast majority of annulments. There needs to be an understanding that there are consequences for our actions. And sometimes that consequence is the cross of living a life of celibacy if you've chosen your life partner poorly and will live your life separately from the person you've married.