And if you manage to automate some of that - automation make your drone swarm vulnerable to disruption. Enemies can wait near automatic refueling/recharging station and capture the drones one-by-one for example. They can put a gps tracker on the automatic drone transport system and shell the enemy base once it gets there. Or they can put a grenade on a captured drone, release it, and detonate it when the drone is recharging destroying the whole swarm cheaply.
Ultimately there's a trade-off between automation and resilience that should be familiar to web developers.