I prefer the preferred view
... straight up... Yasopp booked it from his family to live out his dreams... to be a pirate... there needs to be no reasoning or justification for his actions... Yasopp just wants to live out his life the way he wants and not be tied down in some island when he can go sailing the oceans and shoot people...
so yeah... I think it's right that Usopp inherited his father's will... aspiring to become a brave warrior of the sea ...