We are the Borg. Resource efficiency is irrelevant. Targeting measures are irrelevant. Line your ships up like Space Invaders. We *will* have fun. Resistance is futile. PEW PEW PEW.
Even the battle of Wolf 359, you have to wonder why the Borg didn't just take out the bridge of each Starship and then assimilate everyone, tremendous waste of resources really.
or Locutus/HM the Borg Queen wanted to teach the Federation a lesson.
or they didn't care because 39 ships is nothing compared to trillions of Fed citizens. lol..