Why is protoss still in this game?

Maxpax however has 3-0 Dark,3-1 Solar, and 4-3 Maru,and beaten Reynor multiple times, Beat Heromarine, beat Byun, beat Clem, has beaten serral at maps/ladder, but at tournaments it seems Serral is the last hurdle, and Cure afaik since Cure is disgustingly good at TvP .