And don’t let the door kick you on your way out … eh! But if they are able to freely consent to marriage, are open to life, are willing to raise their children Catholic, why can’t they get married without receiving the Eucharist? and be a member of Christ’s Church in the meantime?They can still receive grace through the SACRAMENT of marriage, even if they are not able to participate fully as members of Christ’s Church. Hoping that graces will flow from there to bring them into an ever greater conformity to God’s will, which is what we all seek.
One of those graces may be REPENTANCE … you never know!

BTW that comes before Confession.
It is not the advice that heals. It is the treatment (grace).
You are implying that we can overcome sin on our own strength. It is possible that a couple may KNOW the right thing, might be willing to make the right choice, but lack the strength (grace) needed to overcome. Sometimes God allows us to struggle in our sin for our humility and His glory. We cannot set time limits on when He chooses to move. Only do our best to be ready to respond to His call.
In some instances tough love is the answer, but not in ALL.
How can you desire Confession without the grace of repentance? Again, I am not saying that they should not be taught. I was married in the Church and not in one instance was the Truth compromised. I was not under any grand illusion that my husband and I were NOT living in sin. On a deep level we knew it was wrong. But we were not at the place spiritually where we could exhibit the kind of grace needed to make those life changes. It was through the Sacrament of Marriage, and an ever deepening relationship with God that we received those graces. Why would you want to deny the couple the very things needed to overcome sin in their life?