Assuming it's true (and it might not be or it could have been retconned) then there are 2 ways of looking at it. On one hand yes, it means the whole thing loses legitimacy. On the other it prevents people like Killmonger from getting the crown. We didn't need a coup to stop Killmonger like we did in the MCU movies because they rigged the game. Whether or not it's legit, it's actually smart.