I am against introducing this ban. I suggest others share their opinions.
Also, a proposal was made to amend the tournament regulations: allow players to choose 2 factions, and also a variant where 2 factions are changed each time before the game with the next opponent (in my opinion, this is already a different tournament).
2. Two races are chosen directly before the game, knowing the opponent's favorites, by indicating your race to the judge: knowing that Seryoga plays with the Orc and the Dungeon, I choose between the Wizard and the Human. I can get a guaranteed losing match-up of Human-Dungeon, a mediocre Human-Orc and Wizard-Orc, and an acceptable Wizard-Dungeon.
There is no ban on races for the next game, even if I play the entire series with the Human.