Ornery Lawyers is why RFM's are written the way there are to a great extent.
But bear in mind....the FAA understands why deviations from the FAR's (which incorporate the RFM) and for Commercial Operators, FAA OPSPECS), are up to the discretion of the Pilot-in-Command during emergencies.
https://www.law.cornell.edu/cfr/text/14/91.3