Multiple nobles in the same realm was never the primary reason we changed the restrictions to one noble per continent.
The real problem is having two nobles in prominent positions in two different realms—then making sure those two realms will never, ever go to war or oppose each other.
I'm quite sure you would both be capable of keeping two characters on opposite sides of a conflict separate, and enjoying doing so. I have done so myself.
But there are too many people in this game who either can't, or aren't interested in doing so. That's why Atamara sank.
That's why we can't have nice things.
