If communication or guidance is disabled, aircraft still need to function in a complex combat environment: they need to be able to intelligently identify target

If communication or guidance is disabled, aircraft still need to function in a complex combat environment: they need to be able to intelligently identify targets, follow rules of engagement, engage correctly, and weigh the costs and benefits of different courses of action. An automated system will never be able to both practically do these things and also emotionally satisfy the humans in charge of militaries (you will never be able to convince a human officer that a drone will be able to autonomously follow rules of engagement and correctly discriminate friend from foe).