Why can't drones defend there colony?

Drones often lack the necessary decision-making capabilities and situational awareness to effectively defend a colony. They typically rely on pre-programmed instructions or remote control, limiting their ability to respond to unexpected threats autonomously. Additionally, drones may face limitations in terms of weaponry, range, and endurance, making them less suitable for sustained defensive operations without human intervention. Thus, their role is usually supplementary rather than primary in defense scenariOS.