Honestly I was expecting the headline to go in a totally different direction, something like "Russia's air force is barely able to leave its own airspace because of poor maintenence, parts and munitions shortages, and widespread alcoholism among flight crews".
Considering they've resorted to lobbing glide-modified free fall bombs, I wouldn't be surprised if some of this actually was due to stockpiles getting so low that they can't use guided munitions for anything but very high value targets (such as maternity hospitals and residential buildings)