These drones can do some very rough aiming if they have weather data for the altitude at which it will fly. Basically you launch and select a flight altitude based on winds and the drone can climb higher mid route to change course if you need. I suspect it would need a dense enough target map to make every flight a winner. Other than that they'll be used as decoys when IIR guided SAM is missing.
They will be horribly inaccurate, like V-1 and V-2 weapons from WWII where the only target they could reliably hit was London... because it was enormous.
In effect these balloons would be ideal if the target was the Black Sea or open empty terrain in Russia.
Blind firing of artillery shells would be about as accurate.
This is a terror weapon, like the desperate incendiary balloons the Japanese launched at America during WWII to try to start forest fires.