The ideal pitcher is the guy who pitches to contact but can also strike people out when needed. Roy Halladay was the type of guy who could do that. He'd keep throwing you cutters and sinkers, but if he needed a strikeout he'd bring up the nasty curveballs.
The problem with contact pitchers is that you have to rely on the defense plus the probability that the ball can still slip past defenders for a base hit.
At least with strikeouts there are less factors in play to get the out