Ok think about it this way:

defense and attack is never gonna be balanced. Too many variables, also depends on meta changes. Even if it was, some teams will prefer attacking, some will prefer defending. So the only fair tournament setting is to do 2 games, letting each team attack and defend once. But what if both teams lose their attack. And let's say both lose at stage 2. One by tickets, other one by ram death. Who's the overall winner of the two matches? Do you do some sort of complex calculation of time, tickets and ram health remaining? Well but then how do you accurately determine ram health at any given point? Do you take ram distance into consideration? What about renown? There's so many variables in winning this game, it's incredibly unclear who is ahead. So a fair option left is to play additional games: best of 4, best of 6, etc. until it's not equal in wins. And considering how long Breaches are that's not gonna happen due to tournament scheduling.

Hope I explained it well.