I go back to they're the best at what they do. Can a coach say "OK, just hit a couple the other way" and it happens? No, of course not. But a 19 year old kid is like clay. If his path to the big leagues is "learn to hit the other way", he'll learn to hit the other way. It's not some crazy secret on how to do it(same "trigger" but keep your hands back), it's just the will and repetition required to do it. Players just have to be motivated to do it. They aren't because managers would rather give Ortiz opportunity to jack one out than lay a bunt down. Right now, the opposing manager would love to see Ortiz bunt as they've taken him out of his "comfort zone".
If the shift becomes increasingly utilized, it will be because it's effective. If it's effective, don't you think all these "data savvy" young managers will seek to make it less effective when used against them? How, exactly, do you think they'll do that?