Roberts's "Umpire" Analogy

The problem with Roberts's umpire analogy is that it completely rejects the idea that the judiciary is a co-equal branch of government (with Congress and the executive branch). It's just specious, completely specious. A baseball game is a competition, played for entertainment purposes, between two teams. Our system of government consists of three, co-equal branches of government, at the national/federal level, and two levels of government, federal and states, with the Supreme Court as "umpire" between state and federal power. So Roberts is half right. I would think that a guy as smart as Roberts would want a higher mark than 50 %.