There are still more than ten days before he leaves this world. After a big war, a major attack on the Sandpeople is unlikely to happen again. If he leaves now, there would be no losses.
Du You has also gained some understanding of what nobilities require for their development. It is basically manpower, military strength, and various materials. Du You had no idea what a Professional needed to develop a territory.
Without preparing these things, Du You used the excuse of scouting first, and left the city.
The military was relieved by Du You's decision. If he had taken a group of people out without knowing anything, it would simply be feeding the Sandpeople.
The southern mountains and the northern oasis are quite far away. If something unexpected happens, White Stone City would not be able to dispatch help in time, so they have to rely on themselves.
Before establishing a territory, it is vital to carefully survey the surroundings and choose a suitable place for development.