Roan made full use of the fact they had Qwerty on their side. It didn't matter if the SANS Units thought Roan was probably bluffing; they had to take the bait. Otherwise, the minimal possibility that he had Qwerty with him during the attacks had to be countered.
During this time, Roan also learned how the robots worked. Even the combat units didn't know much about strategy. Roan wondered if that was a mistake in the robots' production or if the gain of sentience made them just like any normal person. Since the so-called 'creators' had been gone for a long time, no one ever really taught the robots how strategy works.
But then again, the truth couldn't be denied. There were just way too many SANS Units, and most of them were always at the Zoshia Enterprise Building. Each one had at least a power equivalent to a Void Tempering Realm, with some as strong as Elemental Space Realm experts. It was simply impossible to use whatever strategy to get inside with Qwerty.