While I have no argument with your pointing out war profiteering and, even more, the expansion of neoliberal capitalism (wholesale privatization and zero government regulation) into newly “liberated” regions, as described by Naomi Klein and others, such arguments, valid as they might be, often fail to take into account the agency of the people themselves who live in these regions: in this case, what do the Ukrainians themselves want? After 1989, given an opportunity to free themselves from decades of Russian imperialism, people in countries from Estonia to Albania chose to align themselves with Western institutions (or to “toe the Western political line” as you would put it), and as a result they are substantially more prosperous, and more free, than they were thirty years ago. The Ukrainians, free to travel in the West, see this new prosperity and want it for themselves. Who can blame them for that, and why shouldn’t the West welcome them? Nobody is forcing post-communist Europeans down these paths.
That’s where your comparisons with other countries where the US (and others) have spent lavishly on military support fall short. The situation with Ukraine in many respects is quite different.