USAF takes delivery of the GBU-57A/B Penetrator - now there's nowhere to hide OR Something Else?

The U.S. Air Force has just taken delivery of the first GBU-57A/B (Massive Ordnance Penetrator). It weighs 30,000 lb and will penetrate 200 ft of hardened concrete BEFORE it goes off.  More Here

I have my doubts about this. I am starting to think this is a cover story for the use of nuclear weapons

After all, how deep this bomb penetrates is dependent on how fast it is falling, so why would you put those spoilers on the back that slow it down?