Counterpoint: the US made bank being the enforcer of the rules based order. But being the most wealthy country in the world is apparently not enough. And to be direct, the US was the one rattling russia’s cage the past 30 years… and now it all escalated you cannot just nope out without consequences.
And in regards to money spent… the us sends weapons… meaning all the money stays in country, adding to the Pentagon budget for new kit. The EU mostly keeps Ukraine afloat financially… so they can pay their soldiers etc…
The thing, here is no one needs to do anything for the consequences to manifest. And preventing the consequences is really hard work and a delicate balancing act. So there is that.