CADad..was this a trick question?
Surely, you are not advocating only time for sac bunt is pitcher hitting!? To answer your question of why...because chances of scoring from second vastly improve (only one hit needed instead of two, etc). I am not backed up by any stats but I would venture to say that more runs are scored from second with one out than from first with no outs.
You are correct that sacs are not automatic (becoming even less so because of "new thinking"), but they are successful a very high % of the time (especially from the two hole, right). That's the WINNING run you are hopefully trying to get into what everyone calls SCORING position. Do we do away with "average with runners in scoring position" (or just stretch it to include first base
). Manny and Ortiz are paid a little something extra to be in a position to drive 'em home. I just believe that was the definitive sac him over situation (at least in the past)...think about it, winning run leadoff hitter gets on, sac him over to get #3 and #4 chance to win it. It takes away other percentages also (double play, force out, etc.). I'm not being far fetched, am I?