Earlier quoted context omitted.
The Russians aren't risking their planes. They use cruise missiles and drones for behind the lines targets. I don't think the Russians lack guided weapons, they are launching dozens of cruise missiles each week. I think it's quite likely they're rationing their sophisticated weapons in case the conflict escalates. From what I've seen, the drones have been very effective. A $10k drone taking out a $2M tank seems like…
The Russians aren't risking their planes because they have very few pilots, who are under trained and their planes are very vulnerable to air defense without having as good of an ability to counter air defense radars. Their guided weapons have also been shown to not be as accurate as expected, considering that despite all those cruise missiles, drone and satellite surveillance, they haven't really hit many critical t…
As far as accuracy, it's tough to really say. The Russians have claimed to have hit all sorts of things, including a Patriot complex. Of course, the Ukrainians deny that.
As far as drones vs similar costing items, there's a different tool for a different job. I think the drones have proven quite efficient.