Were First World War battleships effectively without point defence?
Short answerNo; their close defence was designed mainly against torpedo boats and destroyers, and leading battleship classes carried useful batteries for that contemporary threat.
NotesFirst World War capital ships did have close defence. Their point-defence problem centered on torpedo boats and destroyers trying to approach within attack range, since aircraft were not yet the primary threat. The Tegetthoff, Francesco Caracciolo, and Iron Duke classes, along with American Standard-type battleships, had original configurations suited to that danger. The relevant question is whether a ship could counter the small attackers of its own period. This historical comparison makes the Star Destroyers look worse because their setting already treats fighters as a demonstrated threat.