Korean Duelists

I have seen so many non korean teams use korean players as thier duelist. What is the reason.

Saya when he was in Guard
T1 ban when he was in Knights

There were some other teams and there are still. But I can't remember their names. What maybe the reason. Are they so good at the game.

no i think its just that there is a huge surplus of korean duelists who played in the korean tier 1 scene and then didnt find a team after that because orgs (C9, T1, TNL, and many others) pulled out by late 2021 which left a lot of duelists from korea available. idk about ban tho i think thats just coincidence.