Ah, but here is what Putin knows, and what makes this whole war workable for him (not as workable as he hoped though): Russia is not a minor player in global oil. They are huge. They produce about what Saudi does (source below) and a solid 70% or more of what the US produces - and IIRC the USA are the biggest.
If the Russian spigot were shut off, the world oil price would spike for real. Forget any democratic leader or even Western party currently in power being re-elected. Forget the post-pandemic recovery. Hell, we might be talking blood in the streets in places far from the war zone. We are talking major oil shock to a world that unfortunately still needs tons of it to survive.
This is why the Biden admin pulled together a coalition of the willing to cooperate to force Russia, and only Russia, to sell at a discount. It has worked to reduce the flow of money back to Russia, but it has worked worse every year as Russia have hired more and more uninsured "shadow fleet" tankers to "launder" their oil - but it has kept the world economy from collapsing. The West has shown remarkable restraint about these tankers so far, IMO. If one or two had unexplained "EV fires" on them, the cost to Russia of hiring these guys - by definition uninsured - might go through the roof.
This oil supply dependency is one thing Putin counted on to subdue international reactions to his invasion. It has made bold moves like "no more buyers of Russian oil" impossible (and, really, I doubt anyone could have stopped India or probably even Turkey from buying anyway), but it has reduced the monetary fuel to his war machine.
IIRC he also counted on his natural gas supply to keep Europe in line, and it probably has had some effect, but it sure accelerated their efforts to get off it.
This is all from stuff I've read since the war started - if anyone knows more detail on the global energy industry, please correct or fill in detail.
Oil suppliers source data (2022 - maybe someone has a newer one) :
Oil production