Why interwar admirals usually commanded from battleships

Did interwar admirals normally use aircraft carriers or battleships as their flagships in joint operations?

Usually battleships, which already had flag accommodation; wartime carrier operations exposed how much aviation-command space the carriers lacked.

Interwar carriers were not generally designed with generous flag facilities, because navies underestimated how many people sustained air and fleet command would require. Aboard Illustrious for Taranto, Lumley Lyster's staff competed with the ship's own command team for limited room. Short exercises could conceal that problem because they emphasized major-unit encounters over the accumulated demands of prolonged war. Peacetime maneuvers offered valuable snapshots without reproducing the full command burden of continuous operations.