I have a pet conspiracy theory.
The greatest minds in card game design don’t work at Wizards of the Coast on Magic: The Gathering or at Ravensburger on the Disney-themed breakout hit Lorcana. But somehow, through some eldritch pact made with the gods of the collectible card game, Square Enix managed to snag the greatest minds in card game design and has kept them in a vault for the last 30 years working on Final Fantasy card minigames. That’s the best explanation I can come up...