Indeed, and how far would you wager it is between the border of Ukraine<>Romania and Ukraine<>Russia, at the shortest point? I'd wager around a lot longer than US<>Cuba.
I imagine the shortest path Russia->Ukraine->EU Members Romania/Hungary/Slovakia/Poland is far shorter than the shortest path Russia->Cuba->Any US State or territory.
Both Cuba and Russia are literal neighbors to the US, it doesn't get closer than that. Cuba is like 150km from the coast of Florida, and Russia is even closer than that to the US!
You're just randomly creating new positions to argue about because why? There is no factual way in which whatever point you are trying to make holds true re. Russia/Cuba to the US is less than Russia/Ukraine to the EU & NATO.
Kaliningrad literally shares borders with Poland and Lithuania. 0 km is the smallest distance possible. Russia and Ukraine both border EU and NATO countries.