If that is the case, it makes more sense to go partway, and wait to see if the ball gets through."
Going partway doesn't really work with a drawn-in infield. And if the infield isn't drawn in, the defense is conceding the run anyway.
Scioscia doesn't always do it, either. With no outs, the contact play is bad -- but Scioscia only runs it with one out. I don't recall seeing the Angels do it lately with zero outs.