As Platoon said earlier, the numbers we are looking at represent BABIP. Since league-average BABIP is normally around .300, you have to sit up and take notice at what look like sustainable BABIPs above .500. Yes, you're trading away SLG for OBP. And not every bunt attempt is put in play - the plate appearance goes on, in that case, and if two strikes are reached then probably the batter swings away. Like any skill, it's hard, and the pitcher has at least a little recourse - four-seamers thrown for high inside strikes would be my first guess what to try*. But basically, moar bunting, plz! * Though, if I guess wrong, and a batter like Dozier isn't bunting, the ball could end up in the stands.