Yes, and the final frontier will be planes, which the US itself won't send because it would take way too long to train Ukrainians with (and you don't wanna put your planes into a near-peer war and risk them being exposed as being useless, in a similar sense to how navies are now useless against hypersonic missiles and to a lesser extent drones). And when the war is over, that'll be the thing that the media latches onto.

We'll see a fucking Forbes article by David Axe with the headline "If The United States Had Sent F-22s To Ukraine, They Would Still Have All Their Territory." after the war is done and the media does a victory lap because Russia lost because they didn't take Kiev and a trillion Russian soldiers died and "only" took 4+ oblasts and ~25% of the territory from Ukraine. There always has to be another Thing We Could/Should Have Done, because the admission that Russia was actually strong enough to destroy Ukraine and take their territory is too much now. Russians have been utterly dehumanized, and what does it mean if you can't even beat somebody you deem to be subhuman?

It's essentially what the Nazis would have had to contend with if they somehow remained the dominant political force and stayed as the government in Germany after they lost the WW2 against the Soviets. That contradiction has to be answered somehow. Hell, that contradiction was part of why the Nazis achieved power in the first place, only after WW1. To be "stabbed in the back", you need somebody to accuse of stabbing you in the back, and that'll be the US government withholding planes for liberal bluecheck Americans coming to terms with the coming reality in post-war Ukraine.