I really disagree. For starters, I would put "not tank your economy into the stone age" firmly into the objectively rational category of thinking. How can this war ever be "worth it" for Putin? Ukrainians will never accept the occupation force and RUSSIA DOESNT EVEN HAVE ONE to begin with. They cannot at all maintain an occupation in the Ukraine. Incapable.
This was a spear-head blitzkrieg operation aimed at replacing Selenskij within a week that was poorly planned and immediately failed and now they are completely and utterly screwed. Putin made this decision based off bad information fed to him - a downside when suppressing your subordinates, keeping bootlickers around and punishing differing opinions.
The objective results are going to be really difficult for Russia at best if not outright destructive. And it was all voluntary.
No idea why he thought any of that was worth the risk...
This is the only type of rationality. What are you imagining when you say "objectively rational"?
> Most economic models need to stop assuming that the typical actor is rational.
Being rational as defined by your personal ideology is what economic models postulate when they assume rationality.