That Boeing FCTM extract is so typical of the way that airmanship and captaincy have been replaced by beancounters' SOPs.
You will find that it is not an SOP, it's a recommendation by the manufacturer after extensive certification, flight testing, previous experience and feedback from the airline training departments and line pilots over the last 50 or so years. The crew did exactly as they have been trained to do and did it well. End result, everyone got home safely and the aircraft was returned to service quickly.