in FACT is,
read the paragraph after the one you have just quoted. It begins with "If the autothrottle is disengaged, or is planned to be disengaged prior to landing........"
You need to read the entire section entitled 'Landing' in order to understand what Boeing recommends, not just a portion on the section.
BOAC & Centaurus seem to be more up to speed than me, so I will defer any further comment to them.