One could not actually fault Dr. Feng for his ignorance. He would only be summoned every time the Technical or Maintenance Department found a bug in the main system. As for what was happening inside the simulation, he completely did not care. It was like how a game developer would only make sure that the program ran smoothly. As for the gaming experience itself, the beta team would be the one to test it out and report if there was any problem.
And Lu Yizhou's rebellious daughter, Bianca, could not even be considered as a bug.
She was born naturally inside the simulator and later gained intelligence and consciousness as her own. Lu Yizhou could not actually classify what she was, he only knew that she had the capability to go in and out of the simulator undetected.
As such, it was no wonder that Dr. Feng knew nothing.