Good discussion of the maritime dimensions of “small wars” here.
Insurgencies, failed states, piracy, terrorism all look pretty much like law enforcement and require similar resources. It requires maritime “boots on the ground” in the form of patrolling vessels to do VBSS, including those that can operate in shallow water . The Navy has shown little interest in this type of warfare. Certainly their resources for these types of operations are limited.
When Operation Market time began in 1965, the Navy had 880 ships in the fleet including 287 cruisers, destroyers, and frigates, but that did not mean they did not see a need to bring in 26 Coast Guard 82 foot patrol boats and build 193 Swift boats. Currently the US Navy has about 273 deployable ships including about 100 cruisers, destroyers, frigates, and LCS, plus 13 PCs and the first of their 85 foot Mk VI boats plus a few smaller boats.
It is the nature of these conflicts, that the Navy will never be able to divert all its assets to address the threat. They will continue to worry about and employ assets to counter other threats.
This is an area where the DOD might want to consider funding Coast Guard forces to be available for contingencies to supplement the Navy’s resources. After all the Coast Guard is the country’s primary repository for knowledge about these types of missions. A decision might be based on a poll of the six Combatant Commander’s views of their requirements. It would not be necessary to be able to meet all these contingencies simultaneously, although two trouble spots is certainly a possibility, but choosing the most demanding could provide a good baseline.