Why the X1's 5.2-inch gun did not become a destroyer weapon

Was the 5.2-inch/42 gun developed for submarine X1 a viable destroyer weapon?

It was considered, but British designers rejected it because its performance and design figures did not suit the destroyer requirement.

D. K. Brown mentions the 5.2-inch/42 gun as a possible destroyer mounting. British naval designers examined the idea, compared it with the destroyer's requirements, and decided that the figures did not work in its favor. The proposal was therefore considered and rejected on design grounds. It is a compact example of procurement filtering an available weapon through the needs of a different hull and mission.