Nobody is making the argument for it from outside Europe, because outside Europe nobody has been asked.
The new FIFA Club World Cup is being framed in Europe as an unwelcome addition, a calendar congestion, a money grab, a player welfare problem, a competitive integrity threat. All of these framings have some truth to them.
But there is another framing. The current Champions League is closed. The pathway to it is restricted to a handful of leagues. The football outside those leagues, which is most of the football in the world, has almost no opportunity to test itself against the top.
A Club World Cup involving 32 teams from across the world is one of the few mechanisms that can produce those matches. South American champions playing European champions. Asian champions playing CONMEBOL runners-up. African champions playing North American champions. These fixtures, played seriously, with stakes, are interesting.
The European press sees only the cost. The cost is real. But the benefit, which is that the global football map gets connected in a way it currently is not, is not zero.
If you have only watched Champions League football, you have a particular sense of what elite football looks like. That sense is incomplete. The Club World Cup, for all its flaws, is one of the few formats that addresses the incompleteness.
The case can be made. Someone should make it.