So, assuming you are right: Is Putin so weak, so feckless, so clueless as to be goaded into a war against his next-door neighbor?
What does that have to do with the price of beans in China?
We need to stop our part of this proxy war that we have no national security interest in which was started by US.
Interestingly, the bulk of the US Army exists because of this non-existent national security interest. The US maintains 20 divisions oriented to fight a peer-level armored, mechanized opponent because ... ? And the reason isnt China. The US doesnt intend to get into continental wars in Asia.
The USN and USAF have a much more global role, but the US Army is mostly there because of NATO, or in other words, Russia.
If you are complaining about the expense of the Ukraine assistance, maybe you should be complaining several times harder about an Army thats 4X the size it should be.