I can't see any indication in this image to suggest that you don't understand black & white, Mike! But I'll throw in my two penn'orth nevertheless:
Perhaps one might consider a colour-desaturated, i.e. Greyscale, image to be an image shorn of its superficial emotional clothing, allowing the eye to concentrate on composition, form, line and texture. It's another way of saying "beauty is only skin deep", I suppose, except that composition, form, line and texture supply "inner beauty", character rather than appearence.
I have read (I am no scientist!) that only the centre of the human eye's vision can recognise colour, which the brain interpolates by reference to memory and experience. The icing on the cake.
So many figures of speech
Just a quick reference to this image ticks all the boxes - composition/form/line (two diagonals, repeated shapes and shadows that between them supply proportion, dimension and depth; the stepping stones and the edge of the beck divide the frame into triangles, a pleasing element), while the textures of concrete, stone, sand and grass add interest. You could reintroduce emotional content by adjusting the depth of the shadows or remove it entirely by discarding contrast - that
is where black & white becomes 'flat' and uninteresting: but then, the same applies to 'flat' colour!
I hope that helps somewhat. N.B.: I have no visual training whatever...