Let’s talk baptism …
To us here that would be like closing the doors of the Church. The child has no responsibility for the marital state of its parents. And then, the baptism of children often becomes a new beginning for parents. Usually there is a little catechesis before baptism, about an hour, then a mystagogic catechesis during liturgy. Then, the priests and laity go to visit these families to continue with their post-baptismal pastoral. And it often happens that parents, who were not married in church, maybe ask to come before the altar to celebrate the sacrament of marriage.
I like this sense of hope and optimism.
My parish had a recent small controversy with the baptism at Sunday Mass of children of two couples, one unmarried and one in a same-sex union. It’s nice to know the Holy Father would support the view that “the supreme law is the salvation of souls.”
Catholic Sensibility 
Well, there is a problem. The infant also has no ability to consent to Baptism. Presumably the consent comes from the parents. But unmarried parents have not consented to the teachings of the church.
It’s an age-old conundrum. Do people affect the efficacy of the sacraments? If they do, have we not fallen into the trap of pelagianism?
Some clergy and even bishops have not consented to the moral teachings of the Church. Is the Eucharist, say, of Bishop Finn invalid because he is a convicted criminal and a moral trespasser? Are we willing to state that?
Don’t you mean Donatism, Todd?
Thanks, Katherine. Yes, that would fit too. But I was thinking about people possessing the power to confect/realize/make fruitful the sacraments by their own actions. Granted, it’s a tricky thing. We have to cooperate with baptism for it to truly take root. But the base reality is all of Christ.