We could take it at face value. They didn't think it would be worth drilling and dilluting shareholders (that was their answer) for drilling, didn't get a greenlight from Teck - but thought they could negotiate it as if it were the case and present it as such on their own. I'm not saying I 100% believe this, but I don't see why this isn't just as possible - it's just not what most of us want to hear/believe. It doesn't necessarily hurt the end result if they do accept it - but didn't okay it from the start.
Also - I'm actually not sure the drills that we brought back were meant for the infill drilling but were supposed to be used somewhere else. I think Chappy or Prospekt said so (though I don't recall and can't confirm). If they weren't meant for the infilling the drills being brought back or not would not have had any impact on the BFS.