Why HMS Eagle retained her 6-inch guns

Why were HMS Eagle's 6-inch guns not removed during the 1930s?

Because Eagle often operated in cruiser-carrier roles on distant stations, where a visible medium-caliber battery still had practical and coercive value.

The space occupied by Eagle's 6-inch battery still supported the way the carrier was employed. On distant stations she often filled cruiser-like roles, including counter-piracy and port presence, even when escorted. A medium-caliber gun could therefore make a useful visible point in situations far short of a fleet battle.