Yusei lived in a part of town that had been rejected by proper society and was falling apart, and he put together a bike made out of spare parts and junkso thats what his deck was based off of
Creatures (13) Planeswalkers (4) Lands (23) Spells (20) A third reason is one Reid touched on years ago: their deck is so redundant that Thoughtseize just costs you mana and life for a trade when a different interactive card would also cost them mana and you no life
a grand list of them includes: Sabotender (the only non-bird common with landfall) Chocobo Racetrack (slow bird token-maker that does nothing the turn you play it) Ride the Shoopuf (card is actually pretty good, no complaints) Tifa Lockhart (the one-shot dream is cool but very hard to pull off in Limited) RG isnt especially well supported in Final Fantasy
At the time, this was a harmless effect used almost exclusively in spread strategies
This, in turn, can allow the player to deal some devastating blows to their opponent if they manage to successfully inflict the status condition they need in time, as long as the opponent doesn't manage to wake up