The excuse of someone not knowing how to bunt is a non-starter for me. If you don't know how to bunt, learn, it's your job. We all have to learn how to do new things in our jobs to stay relevant, so you get no sympathy from me on that front. And to me the actual success rate of the bunts isn't really that important and misses the point. As I said earlier, the end goal is actually just to get the defense to stop shifting. Even if you're only successful 1/3 times (and I firmly believe that with a little practice, success rates would be much higher than 1/3), I bet that would be enough for opposing teams to stop shifting. Anyway, I'd rather be successful 1/3 times bunting against the shift, than probably 1/5 trying to hit into a shift (I'm completely guessing at that number and have no stat to back it up).