Why missile warships stop short of maximum stealth

Why have so few missile frigates and destroyers used stronger stealth shaping?

Most already reduce their signatures, but pursuing maximum stealth can compromise the firepower needed to defend carriers and convoys.

Most modern missile frigates and destroyers already incorporate low-observable features. The degree of signature reduction depends on their combat role. Pursuing maximum stealth can reduce the firepower available to defend a carrier or convoy. An escort must therefore retain the fighting capability needed to protect the other ships, which may remain conspicuous.