Thank you for suggesting this book. I'm not 100% sure what to make of it but it's all available for free online and the introduction is really intriguing. If nothing else, I now know something exists that I didn't before.
The temple that I belong to was founded in Japan. The honorifics we use to describe our High Priest and other priests are never used by then to describe themselves. That posture is consistent in Japanese society in general, not just the sect of Buddhism I belong to. So this does seem very strange to me.