Switch hitting is only a good thing if you can hit from both sides. Players like Lance Berkman, Chipper Jones, Pete Rose and so on greatly benefit from being able to do this. Meanwhile, some people, like Jose Macias, are only switch hitters in the sense that they might be able to hit a ball from either side, something most hitters can do anyways, and use that to get playing time. Thats why Jose Macias needs to be proven as a bad player.