Of course anyone can do that. That's not the point. The point is people shouldn't have to do that to be able to have a chance in the game, because not everyone has hours and hours to waste with that trial and error.
It's maybe 15 minutes of tinkering with stuff a day...
All else being equal, a realm with fewer nobles should lose to a realm with more.
That's the thing though, all else being equal. Right now, a poor realm with 40 nobles beats the rich realm with 20 nobles.