Any small component that required a Paperman to transform and assemble would necessitate Su Ping designing it in its entirety, let alone a gigantic Gundam. Even a humanoid robot would need countless components. Paper Swords, however, were quite simple, only requiring three parts: the sword core, hilt, and blade. That was all there was to it.
But for the colossal body of a Gundam, constructed by tens of thousands, or even hundreds of thousands to millions of Papermen, the components needed for such a massive machine would be difficult to produce even if my brain were cloned ten times, wouldn't they? After all, he would have to start designing from the individual components. Besides, Su Ping was not optimistic about the combat performance of paper merging into a human form for battle. On the contrary, using simple transformations to create Paper Swords, as he was doing now, was, in a sense, an easier and more straightforward way to achieve effective results.