There absolutely is. Vance is describing how his mother-in-law took a sabbatical to help with their first child, and this specific interaction becomes the focus of the article:
“That’s the whole purpose of the postmenopausal female in theory,” Weinstein said at the time.
“Yes,” Vance agreed.
That’s…mostly correct. He should has said, “hypothesis,” instead of, “theory,” and it’s certainly oversimplification, but otherwise, that’s a correct assessment of the Grandmother Hypothesis.
Now, it’s fucking weird to apply that hypothesis to modern society. It’s very strange how Vance can only analyze his mother-in-laws actions through the lens of traditional family values vs. free market capitalism. It’s also pretty telling that Vance ignores the racist comment the interviewer makes when he calls this, “a weird, unadvertised feature of marrying an Indian woman.” But the article glossed over those comments and goes out of its way to make the, “postmenopausal women,” statement sound crazy, without even acknowledging the Grandmother Hypothesis.
It’d be like if Vance said, “You know, if multiverse theory is correct, there may be an Earth where couches have vaginas,” and I wrote an article about how Vance has this crazy belief that there’s more than one Earth. That’s actually not that crazy, and it really shouldn’t be the focus.