No speed is the most important factor. You have a very limited window to get the munition on target. An in Ukrainians case Geran drones drones don't maneuver much, if at all.

Speed obviously isn’t the dominating factor given interceptor drones exist in a world with rockets.

< No speed is the most important factor

Bullets (Or rockets. Or shells with proximity fuses) go much faster so obviously speed isn't the most important factor.

These are anti-aircraft interceptors, intercepting sound like a critical part of the job.

> drones don't maneuver much, if at all.

Yeah, drones didn't fly at 700km/h much if at all either. So can an interceptor drone traveling at 700km/h reliably maneuver to intercept an enemy drone? How well can it do it when a human is piloting?