USCGs can't stay out at sea forever. They have to dock eventually, even nuclear powered carriers. At minimal the oilers and replenishment fleet that sustains th

USCGs can't stay out at sea forever. They have to dock eventually, even nuclear powered carriers. At minimal the oilers and replenishment fleet that sustains them will be vulnerable to port strikes with conventionally tipped ICBMs and shortened kill chain. USN can tactically sink every PLAN ship due to exquisit capabilities in an opening salvo, but operationally PRC can produce/harden enough land based rocketry forces to destroy/degrade enough of USN capita assets that any victory would be pyrrhic. We're in the era of 30CEP ICBMs. Fortress America isn't inpregnable anymore.