Earlier quoted context omitted.
Nit: it's just "Ukraine" not "the Ukraine." See https://en.wikipedia.org/wiki/Name_of_Ukraine
Double nit: this was not a misuse the deprecated term "The Ukraine" but the correct use of 'the' attaching to "Ukrainian one" referring to the NOTAM basically telling everyone to remain clear of Ukrainian airspace.
I don't go around calling other proper nouns "the" (mostly). I don't call my son "Hey there, the Bob, how was school today?" (his name is not bob). But if I had named my son Ukraine then I feel like I'd change that sentence to: "Hey! The Ukraine, how was school today?"
Why is this a thing? I have a formal background in applied/computational linguistics and a bit of trivial searching doesn't really reveal why this is a general tendency. Hurt's my brain meat.