Isn't, like, half the crew of a ship just there to keep the dang thing running? If there's no crew quarters, who's gonna fix this thing when it breaks down?
A shipbuilder has put forward a design for an uncrewed warship intended to complement existing naval vessels in what has been dubbed a "hybrid navy," although it may not be an exact fit for any current requirements.
It is basically a large seagoing drone that is armed like a conventional warship.