Random thought of the day...they beat this drum all the time on the radio broadcast when there is a bunting situation - "how can you expect player xyz to bunt here when they don't have any experience bunting". These are highly compensated professionals (well, some anyway) - why isn't bunting for 5-10 minutes a daily practice routine? With a gift runner on 2nd base in extra innings, unless you have Aaron Judge up to bat, almost every first at bat should be a sac bunt. But nope...nobody in the majors apparently knows how to bunt anymore.
I think the rationale goes something like this:
a runner on 2nd is going to score on most base hits to the outfield, so bunting the lead runner to 3rd is seen as "giving up an out."
granted, the runner on 3rd could then score on a sac fly, wild pitch, passed ball, etc.
but it seems that most teams think they have a better chance to score by having 3 chances to get a base hit.
and I'm sure that the number-crunchers have a room full of data showing how often bunting the runner to 3rd results in a run, as opposed to not bunting him over. and a bad bunt could result in the lead runner getting thrown out at 3rd, which would be the worse possible outcome.