Hi. If I understand you correctly, that’s the point I was trying to make. You get to be absolved of your sins in Confession. Yes, you were honest, but you were absolved. And future sins committed are for future Confession.
Maybe I misunderstood but insincere Confession is when a person is not contrite of his sins but go for Confession to deceive in order to get the marriage mass performed for the marriage. One can still be absolved by the priest because he won’t know one’s heart, but obviously the Confession is not to be done that way.
My point was, non-practicing Catholics should be allowed to get married in the church by following the usual procedure. It is not for us to know their intention if they go for Confession but trusting that the Sacrament would be efficacious as a way for them to come back to the Church and the marriage valid. It would be a new beginning to the couple, and who knows, anything can happen.
More importantly is not to deny them if they should agree to get married in the Church.
On the personal level, in my involvement in the ministry of marriage, I have seen many couples were saved this way, and eventually go back to church. So certainly, God ways is not something that we can predict except to trust that in His love, people may be touched.
I personally disagree if a priest refuses to conduct a marriage mass for Catholics due to one reason or another.
I was once a sponsor for a couple intended to get married but after engagement they were staying in the same apartment together with another tenant, for economic reason as both had just graduated. This priest refused to give a mass for them but only a blessing, saying that they had lived together.
I said they only stayed in the same house. If they wanted to lie, they would not have told him about it. And I said what about Confession. Wouldn’t Confession solved all their sins? He refused nevertheless.
I finally got another priest to say their mass as I did not want them to be deprived of a full matrimonial mass. It was good that they wanted to get married in the church. They could have had a civil marriage, and we might have lost them altogether.
Of course a blessing would serve the purpose of validating their marriage, but we can show mercy and love to be God’s agents of ministering them.