A concept within a concept.
You can wait until you get your hands on a 3D printer to build a concept or you can build one now with silly putty or legos.
The tools are tools. They may not create a reality but they’re good enough to get a point across.
People like to see visuals, whether on paper or in Powerpoint, but they prefer to touch.
Better to build to it as much as you can than to show up and rely on the persuasion of words.