Is this one of the reasons why the quality of the KBO is declining day by day?

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Among national-team level superstars,
there are almost no players
who have moved into coaching or leadership roles..
Everyone is too distracted by their own YouTube channels or broadcasting..
And it seems most current coaches were just bench players during their active years..
Is that also a reason?
Looking at it, aside from Hong Seong-heun or Lee Seung-yuop, everyone else seems insignificant..
And even they are all overseas..