Peter,
I think actually we agree (broadly /in principle if a bit of minor debate about details) on this.
I think it's fair to say that the whole topic of documentation requirements is one of the big areas that isn't always understood clearly, can be a cause of much confusion and where there are some quite strongly held and very divergent views, don't you?
That that there are so many pronouncements from so many different posters (and so many questions) on what a 'quality manual'
is (or is not) or
must be (or mustn't) or
should always contain etc shows this up. It could perhaps be made clearer (eg, by drawing together the various references to doco in various places).
But then we'd have nothing to argue about here - or we'd find something else to debate which could be a good thing