>>11912474
They didn't want people getting locked out of important stuff in disk 4 which is why you're able to go back to the Ragnarok and access the world map again. But IIRC there was some technical reason why they couldn't have all the towns still available as well. So since you wouldn't be able to complete the QOC quest without town access they gave her cards to the card club as a way of not locking you out of those, either. I guess they figured if you finished the CC quest and were at the endgame anyway they didn't need to gatekeep stuff so hard. VIII is a pretty generous game. They wanted you to have most of this stuff.
And yeah, it kind of renders the whole sidequest redundant but if you do the queen's quest you gain access to all those cards much sooner so it's not completely pointless. Some of the rare cards will give you very OP shit so getting them sooner rather than later is very beneficial if you're trying to break the game. Also, the queen can be useful if you want to change trading rules in a region (although like the rule changes, that's a double edged sword because you can end up with direct, which fucking sucks).
I never hated the idea of the Queen of cards quest. It's a nice bit of worldbuilding and almost kind of fun, it just coexists badly with the way the card game rules work. Trying to lose a specific card with the random rule in place just doesn't work, and getting rid of the random rule in all the places she could possibly go is so tedious most people won't bother. I think they knew that but figured since she's not the only source of those cards they could leave it as it was let and make it an optional thing for the most turbo of autists. I distinctly remember arguing with myself about why I bothered doing it. But I had to do it once because otherwise I'd have beaten the game but not *completed* the game. You guys know what I mean