You know the world is f***** when top hierarchy people use their daughters as a negotiations gift or some sort of NSFW gift for others.
All this is actually part of real history and maybe still happening around the world.
The things is if he just accepted money and walked away. It won't did any harm to him.
But that THIRD SON is targeting all D-ranks. And if MC just accepted it, it would became the image of all D-rankers.
It depends. Maybe village route is far from the highways to capital.
Sometimes people of village are not interested in city culture, they most of the time believe in their ways only, that might me the case too.