"It's nothing to do with us" is an easy cop out. Just turn a blind eye to a dictator moving from country to country and rebuilding an empire because "it's nothing to do with us" or stop him at the first country...
That is exactly what the West did for eight years nearly, happy to sit around and plod along with life as Ukraine shelled its own citizen's in Donetsk & Luhansk and the separatist's shelled the Ukrainian army positions around the Donbas as they tried to quell the uprising.
If Ukraine wasn't backed then yeh likely Russia would have rolled them over, so maybe a cause for concern that their eyes might get bigger with other prizes in sight.
But fact is the West provided assistance and this has stopped everything near enough. Russia can't beat Ukraine who only have weaponry and training assistance from the West and yet we're supposed to believe that if they get Ukraine then they'll be after the combined might of the NATO countries once they have had time to rebuild.
I'd agree there are chances they'd view the non-NATO ones as an option, which is wrong yes - but the media narrative doesn't have the same impact when it is about places no-one knows nor cares about, much easier to say Europe is next.