British planners had treated guns as increasingly unnecessary because future naval combat was expected to occur at missile range. The Falklands War demonstrated that ships still had to operate close enough for naval gunfire and other short-range tasks, exposing the danger of designing a fleet around only one predicted form of combat.
Notable Point · 2:24:50-2:25:14
Why the Falklands restored the case for naval guns
A short doctrinal aside warns against assuming that missile warfare will keep ships permanently beyond gun range.