Starting to think those against this rule are being intentionally obtuse. This rule or one almost exactly like it is in practically every game that has a settled tournament format. It's intended to not force players to compete against their best interests.
if both players are aware of standings entering the final round and both make the cut if they don't lose then forcing them to play it out is against their interests. A gentlemans agreement to not fight is in both parties best interest and thus it is included in games that are meant to be competitive. Disagree with it all you want but this is a necessary evolution for any game that means to continue growing competitively.
What troubles me is judges I've seen who have simply stated that using an ID will result in them disqualifying both players for colluding. This is explicitly against the tournament rules and I sincerely hope FFG hammers these judges and TOs if they follow through on their threats.