You won't, because that necessitates a faster drone that your adversary might already be fielding.
This is incorrect. You have layered responses. Faster drones mean less range, speed, or payload. So you layer your defense response to account for the different categories.
This won’t be a game of mine is better faster like marketing pukes like to pretend. Just like memory caches one size does not solve all problems.
Missiles, small kinetic drone interceptors, AA guns, lasers, shotgun drones, gps spoofing, jammers, and high power microwaves just to name some options. Each has its place and saying drone interceptors won’t work shows you have no idea what you are talking about.
We're talking about surface vessels, here. What layer can a drone even occupy? Close-in intercepts are handled with CIWS systems, BMD is covered by VLS, AA handled by SAMs. Drones do not handle any of those mission profiles better than their counterparts, cost be damned.
I'm entirely willing to write off drone interceptors for the foreseeable future. Layered defense certainly presents opportunities, but not for low-reliability expendable doodads.