> Not really, Russia doesn’t have precision guided...
Russia has ample artillery. While they're blind it isn't very effective. Drones correct that deficiency, which is why Russian drones are a serious threat.
> they can cover an area with artillery, but for that you don’t need a drone
This is badly incorrect. You have fantastical ideas about how artillery works. Perhaps you've seen images of a few cratered wheat fields and figure that is Russian SOP and goes on 24x7. It doesn't. Those are major operations that require a lot of costly preparation and time. Russia can't afford to do it on a whim, firing whilly nilly at phantoms. No one can.
Fire must be directed. Otherwise you're just making noise.
We are talking about old, worn out guns firing ammunition way past its expiration date. What you are describing would have worked six months ago — and even then wouldn’t be comparable to what Ukraine is doing, simply because you need an order of magnitude more shots to make up for the lack of guided munitions.
Also, what Russia is doing is mostly making noise. That’s why their offensive over the past couple of months was so hilariously slow. That’s also why they level entire cities instead of specific military targets.