Both your proposal of inaction and my proposal of action will do that. At a certain point it becomes a matter of statistics, which has the best outcome. And as loathed to admit he had a point Stalin put it best "A single death is a tragedy a million is a statistic"
The Ruskies could pull out and enter them any day now. Theyve had what 2 years and they havent. Well with the exception of those jokes they made where they kept all of the Donbas.
The fact of the matter is the ball for peace is on the Ruskie side of the court. They could go home any day they damned well wanted to, put it down as the Russian federation version of the Vietnam war.
They can't, because Ukraine is promised NATO membership when the war is over. That's kinda their own fault for escalating this into a war, but now that it's on the table they can't pull out. They kinda fucked themselves into never retreating from this stupid disaster and without some kind of peace deal that guarantees Ukraine doesn't join NATO the war can never end. They're fucked.
"Oh well they can just let NATO sit right on their border!"
America almost started WW3 over the Cuban missile crisis, having a hostile neighbor like that is an existential threat that can not be allowed.
The matter of NATO expanding into Ukraine is Russias fault, now its their problem. As I said the ball is in their court. Play stupid games win stupid prizes, actually this is kinda like a Greek Tragedy they feared what would happen and sowed the seeds to cause it to happen.
Regardless retreat is always an option, also theres fuck all stopping Ukraine from entering an alliance with the US seperate from NATO. Actually I say we do that, maybe Putin will have a stroke.