I would disagree that it makes more mechanical 'sense'.
There's no way it's as strong as a traditional O/U.
There have to be asymmetrical firing forces at play, and the hinge requires stressing against torque in the open condition.
How does one carry one of those in the 'open' condition? With the barrels down and the stock horizontal? It would seem that it would flop around otherwise. With the stock horizontal, great care would be needed to keep from bumping into things with it.
Ergonomic disaster, yes. Mechanical masterpiece, no.
