I think that is some or the main calculus of the Russian moves. I think Putin is playing the game well and see things as they are.
I would not put it past the US (and some other EU countries too) to write those members off too at this point. But I doubt it will come to that. Putin will get a piece of what he is looking for. Money and land. Pull back and declare it a win. Then monies with flow. Oil prices will remain high. Contracts signed with the EU. No war.
But there is always the chance of miscalculations. One side move or push too hard. As a society we totally and utterly unprepared for any kind of war/conflict with a peer/near peer. Just the cyberwarfare alone would knock much of the west off balance. Imagine if people could not unlock the doors to there houses! Or Tok Tik is down....come to think of it that one would remain up.
I think it comes down to conflict we will have lost in the first few days even with shots not being fired. Power generation down, internet down, large scale misinformation, supply chain disruptions, fifth column attacks etc.
So the people in Washington and else where know this.