Ukraine is having pretty substantial manpower problems in its armed forces. If fully autonomous drones against mobile targets had been figured out, they would been deployed and there would be no need for the more expensive / shorter range fiber optic drones and you wouldn't hear about the manpower issue as much
If we were in a war with widespread conscription that needed self-driving vehicles, I'd bet we'd a) see a lot more investment in them and b) a lot less concern about edge cases.
