Well....all those decades ago as a new, humble F/O on the 737 I didn't think it was my position to tell my leaders they were talking
The explanation made sense - still does - and de-selecting appeared to work well in the airline and has worked fine for me for over 25 years.
Pleased to see the words "normally not" in your FCTM statement, makes one wonder when Boeing WOULD recommend...maybe if proper ground school/SIM/line ops training and demonstration was completed, sadly appears either modern FLT OPS departments are incapable of including such training or maybe it's just too technical a concept for the modern pilot to understand?
Now back in MY day....
Anyhow whatever the wisest of the wise in your FLY DEPT bang on about will have to suffice.
Cheers.
