I discussed before the benefit of the sacraments beyond the binary issue of salvation.
I’m not certain that it’s true that it is divinely revealed that access to the sacraments increases the likelihood of salvation, although it does seem implied in Christ’s command to baptise the nations.
Well think about it this way, if it does not increase the likelihood, then it is worthless anyway and can be done away with.
The Catholic Theology states that Baptism infuses one with Sanctifying grace i.e. share in the Divine life of God. Sacrament of Reconciliation and the Eucharist help reattain this perfect relationship and nourish it.
A non-Catholic simply does not have access to it.
Yes, I’m very happy to say that my understanding of God’s providence is meagre. Certainly a Molinist position gives some understanding of how free will and providence can coexist. And it does provide a possibility for salvation outside of the Church being slim, yet not unfair.
I still don’t like to say things that would seem to limit God’s mercy in any way. It is not clear how many or how few are saved. Perhaps it is fair to say that chances are “slimmer” outside the Church, but I would still hope that God can find a way.
…“Who then can be saved?” Jesus replied, “What is impossible with men is possible with God.” (Luke 18:26-27)
Well it is certainly ONLY possible with God. Salvation is primarily accomplished through his Grace.
I see this issue somewhat in the example of marriage.
So staying faithful to an eternal bond in marriage for an example is very difficult for a non-Christian. But, for a Christian, there is the added incentive of grace given through the sacrament of marriage as well as other sacraments, and even through the knowledge of the importance of marriage obtained through the church.
This does not to say that a non-Christian could never have a successful marriage till their death (the issue is somewhat different here because non-Christians do not share a bond the same sense Christians do. But nevertheless, the breaking of a marriage does lead to disorder in the relationship between man and a woman). A non-Christian couple might have been exposed to the teachings of the Church and it might have appealed more to the law written in their hearts. So their deep conviction to achieve a lasting marriage could pull them through. Though that can still happen but the chances are slimmer and there maybe many faith based impediments (their own faith might allow divorce or not give marriage any prominence).
Now it also does not mean that all Christians would have a successful marriage till death. It just means that if a Christian should have chosen to accept the graces given through the sacrament, they would certainly be able to respond to God. The article of faith here would be that God would never have given an obstacle so big that it was not possible to be overcome through the available graces. The reason why we fail is because we reject his grace.
It is a very similar view I have with the salvation of non-Christians. So could they be saved? Technically yes. But the chances are less.
Are all Christians saved? No, because they can still reject grace.
So why should we evangelize,convert or bring in to communion? Because it would give everyone the best access to all the possible grace that one could have from God.
P.S. Just to clarify, I personally do not hold the Molinist position. But I find it useful in terms of some its explanatory power with respect to these issues.