I disagree with the premise that they would successfully bunt at a rate comparable to those who practice the skill, and I don't want my superstar wasting his time practicing it. Additionally, these guys are paid tens of millions to swing from the heels, that is their job. Other players bunt, so that these guys can swing. I don't care if they're on first base, they aren't disrupting my pitcher's timing, a pitcher can just about pitch from windup with Ortiz on 1B. They, for the most part, are slow base cloggers. If I'm an opposing manager, I'm thrilled if David Ortiz or Prince Fielder is bunting. It takes the bat out of the hands of the biggest threat of my opposition. The risk of injury would also rise. A guy who never bunts is more likely to take one off the hand. To me, this is comparable to saying that Dwight Howard should shoot 3 pointers, because there is a 40% league average success rate, and people don't defend him beyond the arc.