I thought more about these brrrrrrrt devices, just forgot their name. They can take out drones and subsonic missiles, but are useless against a kinetic force coming in at hypersonic speed.
Edit: They are called Phalanx close-in weapons system (CIWS). https://youtu.be/YQHr9TC7lXM
Phalanx they have 4 on a carrier and some on support ships but they can only engage so many targets at once. In a coordinated attack with decoys all coming into the target at once they can be overwhelmed numerically. Figure you use a ton of supersonic smart missiles augmented with hypersonic missiles. you can potentially shoot more ordinance from land than the carrier group would have enough ordinance to defend with.
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