My brother's in-laws, even through Traditional Catholic, criticized him mightily for not using NFP. After all their years of marriage, these in-laws who did use NFP ended up with exactly the same number of children as my brother and his wife ... with the only difference being that my brother did it according to God's will, and that couple according to their own will. But that makes all the difference in the world.
Absolutely so.
If everyone followed God’s will the average family size would be exactly what God means it to be.
Many many people would probably never marry or marry late, but all children would be born in wedlock, none would be murdered in vitro and some couples would have larger families all according to God’s will.