This is one reason I’ve never liked Sam Harris’s writing, even before he wrote the wretched The Moral Landscape.
He does that throughout The End of Faith, and it’s maddening. You see it, right? Starting with “a Christian” and then saying “his” – as if “a Christian” is automatically a man, as if male is the default sex, as if male is normal and female is weird. That’s a bad, clumsy, confusing way to write, even if you’re indifferent to the politics of it. It’s his wife, it’s making a man invisible; it’s his his his he he he – throughout the book, every time.
There’s also of course the threadbare and suspect choice of “that his wife is cheating on him” with all its unpleasant undertones – that “his wife” is his property, that what she does is something done to him, that wives are probably sluts, all that. A good writer doesn’t do that. A good writer stops to think of an example that isn’t threadbare and loaded with nasty baggage. A good writer thinks more carefully about the words.