As a point of method: We can and should distinguish "What the author intended" from "what is the unintended side effect of this use of language."
I'm explicitly not commenting on what the author intended to mean by this title choice (yes, a "person who is uncritically affirmative"). (I have absolutely no axe to grind with the author either, just for the record!)
But generally speaking, it's fair to comment on the unintended side effects of someone's use of language, because there are always side effects when we use language. That's how language is -- it exceeds our intentions, because it's a legacy tool with generations of unexplored cultural baggage, to put it in an idiom that software folks might appreciate.