You haven't a clue how many stronger players are in Korea. The thing is that OWL bought out Korean teams (Excelsior, Spitfire bought two teams, Dynasty) and they're not always the top players in their positions. They just played together for a while so they reduce costs of building up teamwork. Koreans aren't brought into the rosters individually (like Sayaplayer). This process is just difficult, like how Korean World Cup committee struggled to pick the Korean dream team.

Of course, I can't say much of how the teams are working internally, for example, if a player is affecting teammates negatively by tilting or something. But ultimately, it won't be Korea becoming less strong. It'll other regions becoming stronger through scrimming Koreans. I mean, there are 14 year olds from Korea that can contend to the top respective positions. Not only that, because of inflexibility of teams/rules/bureaucracy, players like Sparkle was stuck in Challengers. Just look at GC Busan that came straight out of Challengers and won APEX, with scores of 3-1, 3-0, 4-0 at that against LH and KDP.

Talent pool in Korea runs not only deep, but new ones will keep popping up and keep dethroning as long as OW is decently popular in Korea.

0:4watch
dhaK vs. tobi Lucios should be interesting though.