I think the point is that the ship is itself an expensive and vulnerable method of delivering drones to a target (because warfare has become all about delivering more drones to the target than the other guy can cope with).
If you deployed 100 patrol boats, each with 100 drones and no missiles, that is a cheaper, more efficient, more resilient solution that one ship with 1000 drones and a bunch of missiles.
Define drones. Define missiles. How big are these drones? Are they group 1? Group 3[0]? Can this ship with missiles use its group 4 drones to find and fix these patrol boats so it can toss missiles at the opposing patrol boats? Can the patrol boats do anything about the missiles incoming at M3? Can I use some group 4 drones to drop a bunch of group 1 drones in the vicinity of those patrol boats, where they have no response because they don’t have medium anti-air capability?
Vulnerable does not mean obsolete.
0: https://en.wikipedia.org/wiki/UAS_groups_of_the_United_State...
Patrol boats are fine for low intensity coastal security missions but mostly useless in any high intensity conflict. They can't operate effectively far from shore. And close to shore you might as well use land based aircraft and missiles.