Judging from the amount of misses the US military makes, I'm pretty sure they can't throw a flying drill attached to a missile and make it hit the same 3 foot wide burrow hole twice.
Watch the video I just posted. And for those misses it can be technical or human error. You can't deny the accuracy of the weapons.
The bomb is real. Just because it does not penetrate to the degree that WE wanted, that does not mean Iran does not care about it. Just because all I have a .22 pistol instead of a .44 Magnum, does that mean you do not care if I start shooting in your direction?