You are misquoting me there. That word was said in the context of making it clear that if I roleplay that I am in A, but the game shows me in B, then I am in B. If I roleplay my men as cavalry, but the battle report shows me commanding archers, then I am commanding archers. Roleplay can not change the reality of the game, only fill in the blanks.
When the game mechanic tells you that nobles have been banned, you can fill in the blanks by thinking of a way in which it would make sense for them to be banned, but you cannot create a RP that results in the bans not being carried out. Because they have been carried out. I'm not sure how you were misquoted here....
