Maybe? Your example is kind of trivial, not really representative of anything. Using Grasshopper is also another layer.
But yeah this is what a lot of people don’t understand when they wonder why Rhino doesn’t seem to be as fast as some game engine. Aside from the fact they have more people working on optimizing single parts of their graphics than the entire Rhino development team a game is a STATIC thing, nothing happens that hasn’t been accounted for already. “Content creation” is a different thing, and shoving polygons to the video card is a small part of what happens when you create or edit anything. If you just make an array of 1000 balls, you can see how quick it can preview that, but that’s because it’s not saving undo states or setting up the data structures for materials or whatever other hundred things it has to do when you’re actually working with the model itself.