Walks mean you took a lot of pitches in your at bat showing good plate discipline, and you got the pitchers pitch count up to get to the pen faster.
Yeah, teams are thrilled to see the end of Dickey, Johnson, and Buehrle, so that they can see the soft tossing Cecil, Delabar, and Janssen.
Taking pitches only works if the whole team buys into it, so that you can see weak middle relievers, as opposed to the setup man and the closer.
Having one or two guys taking pitches doesn't really help out that much. If you have an entire team constructed around the philosophy of taking pitches and you work over their entire bullpen in the first game of a four game series, it pays dividends.