Fair enough. If you read that quote in isolation, I can see where you’d think he’s wrong. But you have to read the rest.
"A Christian marriage should be about what Jesus Christ’s death and Resurrection has to do with marriage.
What does Christ tell us through St. Paul in Ephesians? Ephesians says Christian marriage is like the union between Christ and the church, a permanent union, a union of love, a union of shared life.
It’s not about the love of a man and a woman; it’s about the love of a man and a woman in the context of the fact that Jesus Christ died and rose for our salvation."
According to this, Christian marriage is not about a ritual expression of the love between a man and a woman. Christian marriage is about the spousal love between Christ and the Church. That’s why it’s a Sacrament. It points to something beyond itself. Incidentally, Archbishop Fulton J. Sheen, in one of his many talks on marriage, said almost the exact same thing as what Fr. Taft said.