I am gonna agree about the bravery of the Avro Vulcan flying all the way to Malvinas and back.
I am also agree about Argentine Military Commanders after the first Black Buck were very aware of the British capability of bombing any target at the continent.
But those rides did not make too much damage, the bomb crater was fix after one or two days.
In fact, the Vulcan, SHR and GR3 couldn't hit the runway strip after May 1st.
The Argentine Air Force C-130H and Argentine Navy L-188 Electra and Fokker F-28 kept supplying the Argentinian forces until the very end of the war.
The last C-130H supply mission was on the 13th.
For your information, the Avro Vulcan was targeted in its first ride by the Roland and the Oerlikon Contraves 35 mm radars, but the rules of engagement at that moment were ask to the Command post for shooting clearence before pressing the trigger. When they got the clearence the Avro Vulcan already dropped the bombs and it was out of range for firing or lunching.
That rule changed right after that bombing.