I'm not sure why some want to devalue defense. Hitting isn't just the only part of the game of baseball. Defense is a major part of the game and just as important if not more important then hitting. There's a reason good fielding teams tend to make it to the playoffs. But then again some people think a football game that ends 63-62 is somehow how a "good game"... This is why the DH is coming to the NL sooner than later. The fans need their offensive fix cause that's all that seems to matter anymore.
Defense is extremely important in a sense. And I cant stress enough the importance of defense at defensive premium spots.
But, WAR, imo, overstates defense at non premiuim positions. This is a thought that is opined by others that follow the game.
The one article I posted mentions how the Mariners thought they were gonna moneyball the league and loaded up on defense only to finish as the worst team in baseball.