The battleship would not deploy alone against submarines

How could a modern battleship deploy when it has no defense against submarines?

It would not operate as a lone pure battleship; it is the centerpiece of an uncrewed task group whose distributed assets provide layered submarine defense.

The objection assumes a lone battleship without submarine defenses. The proposed ship would operate as the centerpiece of an uncrewed task group. That formation would include multiple anti-submarine defenses. Assessing the hull alone leaves out the surrounding assets on which the concept depends.