That's only 4-8 active drones at a time though. The article talked about deployments with dozens of drones in a given school. Sure you want to keep some in reserve but at some point from the perspective of the drone company it makes too much financial sense to have one person piloting more than one drone at a time since the technology exists.

Miltech companies have been developing fully autonomous drones for combat scenarios since jammers can prevent manual control and are currently used in combat zones for that exact reason. Mithril Defense which is selling these drones also makes combat drones. I'd be very surprised if they actually maintain 1to1 drone operator to drone ratios for any amount of time