Well, a hit IS better than a walk, so if two players have an identical OBP, it makes sense to value the one with a higher batting average, as long as the difference in power isn't too great. Even then, it seems like 3TO players are mistake hitters who flourish against bad pitchers. When a pitcher misses his spot, he either walks the guy or gives up a dinger, while when he makes his pitches, the guy strikes out. They have a harder time fouling off good pitches in order to get their pitch or even making good contact on a pitcher's pitch. Generally, guys with high batting averages but lower walk rates are better at this skill, and are more valuable when trying to drive in runs late in the game against a good relief pitcher.