Ukraine is a major global food supplier. The war has directly impacted food prices. And if Russia succeeds, it will only encourage more conflict of this kind. And that's ignoring the possibility that this will escalate into an even larger conflict because Putin decides that NATO's resolve is weak enough that article 5 is no longer a plausible threat.

Also, that stupid argument applies just as much to funding schools, cancer research, fighting climate change and basically all other functions of government that serve the public good. We should do more to address economic issues, but that doesn't mean we should stop doing everything else.