The war is still in early stages.
So far the tactics of the west work. Keep out directly and deliver to the Ukraine what is possible.
Why risking escalation into a nuclear war at this moment?
If NATO would move in, it wouldn't be over in a jiffy either.
One, I think if Putin had working nukes, he'd have used them. He's cornered and pretty obviously not in the best health, and corned beings are dangerous.
Two, by not doing something sooner, we've basically said 'we won't stop you.' and so Putin has had time to infiltrate how many countries? I don't even know. But I do know that in all likelihood, Brexit wouldn't have happened, Twitler wouldn't have been elected, Le Pen wouldn't have happened.... Sure, no way of knowing for sure, short of looking in on a different time line, and since we don't know if there are different timelines, and even if they exist, no way of giving them a peek.
Three, I feel like, if NATO or a UN peacekeeping mission were to take part, its unlikely that the war would take that long. I mean, if Ukraine with just equipment help is doing a number on Russia's forces, I don't think that they would pose a problem for the full military might of the west and allies, especially since it seems like there is a Russian resistance to this whole mess. Also, it might send a message to China that maybe trying to snap up Taiwan would be better held off.
Four, I can be wrong on things, I'm well aware of it, but most times, if I am wrong, its because I didn't trust my gut. Also, even if I was in one of the Eastern EU countries, I'd still feel that standing up to bullies is important. And the thing is, when I have in the past, they are the ones who backed down. Because that's what bullies are; cowards hiding their fear behind aggression.
And again, we should have done something in the late 1900s
couldn't resist when RF started invading former soviet states.