Again, you’re missing the point.
It’s not about being a viable product, it’s about pushing the boundaries of what’s possible.
If engineers never strive to create new things, then everything stagnates.
The point of this demo, like a SpaceX test flight, is to push boundaries. Anyone that has experience of designing complex engineering projects knows how difficult it is to make new things. And how you often learn more from failing than from things working first time. SpaceX have perfected that idea.