Removing color is the beginning, not the whole edit.
Two colors that look separate can become the same gray. A useful monochrome treatment preserves enough tonal distance for the subject to stay readable, then decides how deep the blacks, bright the skin, and visible the grain should be.
The selected Acros-inspired recipe favors fine texture and a deep but controlled scale. Compare it with the red-filter variant for brighter skin and darker skies, or with Tri-X and T-Max interpretations when you want rougher or cleaner grain.