Thanks for the cite. It shows the laws were changed even later than I thought, and as I said, by Leftists for their own purposes. Hard case, bad law. Passed in the 1970s—the decade of Row vs. Wade, with no precedent in the history of civilization. No a promising pedigree for starters.
Where the feminists really want to go with it—and you can hear it in the colleges today—is to prove that marriage is in itself rape. That's what lesbians like Susan Brownmiller were saying in the early 1970s. Feminists are about envy: trying to tempt and harrass married couples into disunity from a hundred different angles.
The bond of marriage, where two become one flesh, does involve giving up one's own self, and keeping outsiders out of your disputes. It requires charity, manners, and self-sacrifice, and is risky, like all good things. You can be betrayed or mistreated. Bad husbands and bad wives are always there—but people once had the assumption that it was up to them to work things out, rather than looking for Control + Z. It's really about sex being private. If the option of calling the cops, the social workers, or the divorce lawyers is in the back of your mind as an option—in short, if you're always trying to avoid falling down—you'll never ascend the heights.
Maritial unity was common sense in the 1950s. To the modern mind, among people who haven't read history, even good conservatives, it's a scandal.