The second part of the Catholic view is what is embedded in the common law tradition, and is as much Anglican as Roman Catholic. Both views have it that marriage is a sacred institution, deeply rooted the nature of mankind. Mankind as created in the image of God, not only as an ape with a big head. That head size, of course, plays its part. Given that it forces the mother to give birth somewhat prematurely. Hence a Chimp is born more mature and until the age of about two can actually outperform mentally many human infants, and is much less dependent on adults at, say, age six.
Yeah, sorry, but your libertarian fantasy of imposing a Catholic theocracy on the American people, isn’t going to happen.