The fact it's about a book rather than a scientific article makes me suspicious. Finding people who are untreated and struggling is common. So what's the point

The fact it's about a book rather than a scientific article makes me suspicious. Finding people who are untreated and struggling is common. So what's the point of it being a book? Other than cashing in on the "it's all in your head" sentiment? Claiming it's real in a small aside just seems like ass covering.