Oh come on, now I'm not a big fan of the sacrifice bunt (for a non pitcher) but three shots vs. two is a plain distortion. Runner at second, two shots to get a single and score the run. Runner at first, you don't have three shots to score him with one single, you need two hits. That's two hits in three shots, and the math says that two hits in three shots is harder than one hit in two shots. And yes, my analysis is way simplistic too, I'm just making a point that it isn't all that simple.