But the Bastion couldn't maneuver, defend itself properly, and etc. Besides, it was remote controled. And you need people for NAV, Sensors, Comms, Weapons, Fighterbay ( rearm, pilot, supply, repair ), engines, engineers, bridge to control everything, life support control, maintenance, etc. You actually need the crew. An AI controlled ship couldn't support a crew or fighters/bombers. And AI can be outsmarted by people. Plus, AI doesn't have the 'instinct of survival', so you'd loose a lot of AI controled ships. And as far as I know, they are still expensive and need time to be built. Also, AI ships wouldn't be able to properly defend others. Sorry, writing from a phone, can't expand the ideas.