I disagree. Laying down a good bunt against a straight-up defense is a challenge and certainly takes time to practice and hone the skill. But against the shift, all you need to do is keep the ball left of the pitcher and bunt the damned ball as hard as you can. Most of the nuance of a traditional "good bunt" doesn't exist when bunting against a shift. In fact, you want the opposite effect against a shift (bunt hard versus practicing making the ball die in the grass 20-30 feet from the plate). When bunting against a shift, you want the ball to roll as far as possible as quickly as possible. If the defense is radically shifted, there's a chance you get two bases if it reaches the outfield grass. Is doing that easy? Eh, I hesitate to call anything at the MLB level "easy" but holding out a bat, putting wood on the ball, and hitting it in a specific direction isn't the most challenging skill to learn.