I see what you mean but think that it is not applicable to the current drone situation in Ukraine. It is quite possible to shoot down these drones, it is merely

I see what you mean but think that it is not applicable to the current drone situation in Ukraine. It is quite possible to shoot down these drones, it is merely difficult to do so cost effectively with the means they have at the moment. An old-style flak gun coupled to a basic anti-air radar would probably work just fine and is definitely not out of reach for the West to build; the challenge is to get enough of those out in the field quickly enough. Something like the https://en.wikipedia.org/wiki/Flakpanzer_Gepard https://en.wikipedia.org/wiki/Flakpanzer_Gepard would be an absolute beast against simple drones, but according to the wiki the Ukrainians only have about 30 of them and they are limited to ~5 km range. They would need a lot more, which would take some time to acquire. Then again you could dispense with the tracked undercarriage for defending static objects like power plants, so just getting the guns would be enough.