Riboku is no more of a fraud than any other great general

Being able to talk strong people in the country to join you is no more of an asspull than generals who look up and see a crow flying then realize the enemy general must have xyz strategy in place. It’s no more of an ass pull than one guy yelling so loud his whole army hears him and gets powered. No more of an asspull than someone with the ability to 1v100 an army.