Why is the Church so defensive about marriage even when it is not sacramental? Why does the Church insist on the goodness of natural marriage? What does this say about sacramental marriage?

Cy Kellett:
Hello, and welcome again to Catholic Answers Focus. I’m Cy Kellett, your host. And today, we take a look at marriage with Father Hugh Barbour, Norbertine priest. I know the temptation is killing you right now.
Fr. Hugh Barbour:
What temptation?
CK:
You know what I’m talking about. I could see the word forming in your mouth.
FHB:
No. No, absolutely not. I don’t know what you…