I agree, the same happened to ESPA event, every deck I built aiming the faction was easily beaten by the meta people: spellbooks, fur hire, sylvans, etc. Just some few duels were against people using decks around the faction itself.
Konami could easily have enforced players to use enough of a certain card (rather than just literally one card, like Dark Magician for Yugi) or just straight up limited Amazoness & Fur Hire for the special duels. They didn’t.
They want to encourage players to be able to use the meta decks ‘cause they freshly bought them. Thus... (1/2)
... those players will get awards and wins. It positively reinforces people to purchase those cards.
Konami might want people to have fun, but they’re a money-grubbing company first. For sure they’ll make the rules slack enough for players to use meta decks, since those players are the ones who paid the most. They’ll support those the most.