I would much rather pay for a missile that Ukraine fires against a Russian tank in Ukraine, than pay for a missile I have to fire against the Russian tank myself after it rolled through Ukraine and to my doorstep.
I would also much rather pay to educate the world (using Russia as an example) that the international community isn’t putting up with wars of aggression and won’t let you get away with them, than have the world thrown into disarray when the next country decides to disrupt global supply chains with their war of aggression.
Supporting Ukraine is a smart thing regardless of what you think of Ukraine. It’s also the morally right thing, but if you don’t care about that, egoism should drive you to the same decision.
That sounds like something Jackass would do.