Humm, any ordnance (guided or unguided) dropped from 50,000 or (worst) 70,000 feet will certainly miss anything ! GPS and LGB bombs are just iron bombs with some devices witch allow "flight" correction. It's not missiles with an engine
.
Moderns area SAM are really nasty things,warhead filled with lot of high explosives, metals balls, flechettes.
Against a well equip country the 70,000 ft cruising B2 will certainly hit the ground quickly.
The Stinger in Afghanistan was really effective until the soviet mount some decoy, flare ect, stop to gently fly at medium altitude like big turkey and use tactical fly for ground operation or high altitude transit.
AAA = go away you have nothing to do here !
Light SAM = holy [censored] ! CENTCOM said theyre's NO air defense here.
Are SAM = Don't play with me if you haven't a lot of ECM's, Hawaks, Sentry ect to cover your ***