I am not saying that it was the most succesful bombing mission ever, but to use the terms that the raid was one of the most 'retarded' 'useless' and 'expensive' operations in history, is frankly bullpoop.
To begin with, Black Buck Vulcans didn't took off from mainland UK but from Ascension Islands. You should read the links I've posted. 2nd, sending bombers from far away is a projection of power indeed, but it was dwarfed by the Task Force (with carrier) sent to the Falklands. I don't think that it was really necessary IMHO.
In fact, it is not my opinion but Sharkey Ward's... Agreed, he didn't use the same terms, but it is well possible that he used even harsher ones (I need to re-read the book)! As the CO of one of the two FAA Sea Harrier squadrons, the political decisions all along the war really hampered the efficiency of his unit and did cause him serious frustration. The lack of trust from the TF CO in the Sea Harrier radar was one of the main causes of the loss of the Sheffield and the troop transport Galahad.
Anyway, Ward was there, he fought over there (shot 3 planes down) and I'll value his opinion above whatever armchair analysts have written (this is
not aimed at you...).
Try to find the book, it is a really good read.