Re: first contact lack of common sense?
^^ Um, I think the OP is asking why the Borg
didn't destroy the Vulcan ships.
"Quite possibly, the five Jem'Hadar could turn Data into a collection of four spasming limbs, one helpless torso, and one head that shouts insults at them like the Black Knight from the Monty Python sketch." -Timo Saloniemi