> but programmatically.

That’s one reason to use Inkscape. If I want to draw a design, I have a shape in mind I then try to draw by editing the points as I see them, with instant visual feedback. I don’t want to code in points and have to modify coordinates.

It’s like asking why people use a parametric CAD suite like NX if they could just use OpenSCAD. If you want to model something, seeing it and editing it in the 3D view can be much nicer than editing code.