Lacking in this conversation so far is the absurdity of yet another "precision ground attack" platform, when there are already ship / submarine / air land launc

Lacking in this conversation so far is the absurdity of yet another "precision ground attack" platform, when there are already ship / submarine / air land launched cruise missiles, air launched guided bombs from (supposedly) stealthy fighters, and in a pinch short-range SLBMs or SRBMs. They might have cost disadvantages compared to the theoretical marginal cost of the Zumwalt rounds, but I get the sense that the DoD is not exactly optimizing for cost.