I'm aware, but that doesn't mean I can't question the robustness of the (hypothetical) final interface. If a man looks at a blueprint and asks, "will it work?" he's not asking if the ink on paper has structural integrity - he's asking about the final product.
This isn't even a blueprint, though. It's a concept piece. You can make vague judgments about it, but the truth is that people here wondering whether this would be practical is probably the closest to actual engineering that this design has gone.
I wouldn't worry much about robustness - it's not certain that this would even work in the first place.
