I must say, you have taken childish pedantry to a whole new level.

'Macronutrients' are not diet 'nutrients'. Nutrients are chemicals the body needs an external supply of. Building blocks for cells and structures. They have nothing to do with metabolism.

Even at a basic level, that's not true. Despite popular myth, the body can derive 1.5/2 cal/g of fiber as well.

> While there is still some debate in the area, researchers have assigned a caloric value to fiber of 1.5-2 cal/gram (depending on the specific type).

Source: http://www.bodyrecomposition.com/nutrition/fiber-its-natures...

Ah yes, but then those are fat calories, not "fibre" calories.