That is not at all what I am saying Brian.
What I am saying is that the colour of the light can affect a B&W image as well, but that is something that most photographers never notice. A B&W image shot at blue hour will look different than one shot a few minutes earlier during golden hour simply because the colour of the light is different, which will look different if shot before the beginning of golden hour. Sometimes these changes are subtle, sometimes they are not.
Anyone who has shot B&W on a stage where gelled lights are used will definitely notice this as the skin tones of the actors will look quite different, depending on the colours of the light.
As an example; this is a blue hour shot that I decided to do in B&W because I did not find the mood of the colours is what I wanted to capture. I'm simply suggesting eliminating colour needs to be a considered decision for someone like Trevor who is not a pure B&W shooter.
Donald and Sharon do a lot of B&W work, and that is absolutely fine by me. I know other photographers that shoot pretty well only B&W I have no issues at all with their approach. I get into bursts of just doing B&W work from time to time too.