Last year Ukraine wasn't particularly worried the US would cut off military aid, Romania wasn't particularly worried the US would paint it as a poster child of failed democracies, and Denmark wasn't particularly worried the US would annex Greenland. The world is unpredictable.
Nah, Ukraine knew Trump had an excellent chance of winning and was likely to cut off military aid, and the rest of the world was well aware that a Trump return would mean more moronic threats and trash talking.
Trust me, we're not rushing out to buy shitty Russian aircraft as a hedge.