Obviously because you can't K before you get to 2 strikes, but, becoming a better hitter helps reduce strikeouts. That's the point. You become a better hitter, you put more balls in play. You're still going to strikeout and you're probably going to foul off a lot of pitches and probably draw more walks. But if a dude's looking to simply improve enough to learn to make better contact, he's probably not going to strikeout more than is normal for him. If he decides he wants to start putting balls over the fence more, then he's definitely going to put up more Ks.