This is obviously not about the power of kespa. It is about the power of the player. It is fundamentally the players IP rights Blizzard is suing. SC BW players put in a tremendous effort to develop an exceptional skill at playing games people want to watch. They spend much much more time than Blizzard devs. If the court rules that the player has no role in the creation of this IP then that is a major blow for esports players.
Broadcasting channels/websites have no real problem. They can broadcast cheaply and get ad money. The player has to try to make a living. He can't if what he works so hard for is automatically owned by Blizzard.