Except that detectability is an advantage, in the doesn't-set-off-global-thermonuclear-war sense. If your nuclear (or command) assets can be removed at any time

Except that detectability is an advantage, in the doesn't-set-off-global-thermonuclear-war sense. If your nuclear (or command) assets can be removed at any time without enough warning to launch, that means you have to launch now before that happens. If you want to hit something with a conventional warhead in a non-peer state without warning, why not use a stealthy cruise missile instead?