If you look at the first iron bridges in the world, you will see that they were all built the way wooden bridges were built -- expect using iron. The [Iron Bridge](https://en.wikipedia.org/wiki/The_Iron_Bridge) is built with woodworking joints.
It took us a lot of years to master and discover new construction techniques.
We didn't have computers to do static analysis or form-finding. Construction with new materials was necessarily conservative.
Concrete (or cement in this case) is hardly a new material. The method of assembly is, and the fact remains that this tech has the potential to do amazing things. I'm not sure what this Disney recreation is trying demonstrate.
Now that the difficult challenge of getting the device working has been met, I hope the inventor will tackle more...for instance, how does the device actually create an enclosure.
It took us a lot of years to master and discover new construction techniques.