Many use cases are better served without fiber (as fiber causes limited range, limited payload and need for unhampered (not through tree branches for example) access to target

They use Starlink to communicate with each other and for over the horizon drone attacks.

Most drones are the regular wireless FPV. Not 5G/Starlink/Fiber.

I think the latest Geran-2s either use starlink (suspect) or guowang (more likely). I can't find reliable confirmation of which one.