Robin started furrowing his eyebrows upon hearing this... He didn't take that into account
His future plan was to eat as much land as possible, develop it and make its inhabitants live a better life, in this way he would easily be able to annex the rest of the duchies and kingdoms around the kingdom of the Black Sun where the ruling class would fear him and the commoners would long to join him!
Even if the plan was stopped, for now, he intended to resume it if he returned from this mission alive, but... It seems that he forgot a very important element, the information networks!
If his enemies could cut off news of how the people lived in his lands and pass on news and rumors that turn Robin is a monster instead, the magic will turn on the sorcerer... That is what happened with the Second Heaven's Chosen anyway.