Does judging players by the number of "rings" really make any sense?

Baseball is a TEAM sport and your success is only as good as the total performance of the entire team. In the playoffs Yankee pitching was terrible, Matsui batted .182, Posada .133, and Jeter .176 with 3 crucial double plays, while A-Rod batted .267. Yet people blame A-Rod for the loss. Nonsense!