We disagree on the severity of the mistake, hiding information from adversaries is a core competency and a big part of training. Someone who failed to learn from that training has a low innate intelligence and even if trained is unable to use the training effectively and is a liability.

The CIA for example drills into their people this same information denial training but they appear to neglect randomness so you end up with a bunch of people with the same peculiar behavioral patterns so they’re ironically rather easy to detect if you have access to click stream data. For example, they’re told not to follow each other on social media, but they still interact so you end up with two people who freely follow lots of people who interact with each other frequently but don’t follow each other. It’s weird, I’m not saying everyone who does this is information hiding but you can extract networks of people who behave in this same weird way with each other.

In order to protect the enigma cracking secret the UK randomly allowed themselves to be bombed with a bias towards less strategic targets. That’s the kind of thing you have to do to hide information, letting yourself be bombed should denote just how serious it is.

Yeah, I'm serious, I'm not making a 'if you kill your enemies they win' argument but part of learning by doing is having the people who make poor decisions suffer the consequence of those decisions so that there are fewer people around making poor decisions. Especially in the military where you're spending other peoples money and other people suffer the consequences of your misadventures. Of course there is quite a lot of randomness in outcomes, but a blunder of this magnitude is inexcusable considering their line of work. Because of the corruption in the Russian army I would assume there is only a weak link between competence and rank and having an actual enemy around to punish mistakes would be helpful in winnowing out the morons. I'm pretty sure Russia knows they're corrupt and have deliberately adopted a learn by doing strategy to improve their warfighting capability for this very reason.

A big part of the process in undermining an opposition is promoting the worst aspects in them. Instead of killing off a moron, perhaps secretly encourage them to run for office and donate to their political campaigns, secretly buy media coverage for them, etc.

Arguments based on natural selection are sometimes unintuitive!

It's fair, but they've been working on improving the quality of their officers since 1904.

I mean, I assume it's mostly a joke, but if you assume that their system of selecting high officers isn't merit-based (which you would tend to assume given that it is Putin's Russia) then assassination which preferentially kills off the more incompetent officers would indeed be beneficial to the military as a whole.