Making new textures isn't impossible, it's just a lack of rationale. If you keep CS, the soldiers themselves are male civilians, and there is no need to add a separate male civilian. If CS is abolished, then there is no need to make new textures, because soldiers no longer have the civilian clothes they work when they work.
Just because this is clear, whether it is "Classic Mode" or "Delenda Est", "Mirror" and other mods, they all go a step further on the basis of this mod with male and female citizens, and simply cancel CS.