Wartime conditions means they push the machines pretty hard, I'd imagine a lot of aircraft need as many maintenance man hours as flight ones. Could have sworn someone here was a mechanic in the USAF.
Re: Drones. I am a bit puzzled at the fuss about them, past couple of days my local media has been going on as if these things will annihilate Ukraine. Bolton's probably aroused as hell, have an excuse to go bomb Iran over this (something something rule based international order)