I have no doubt that President Truman and President Harriman have been courting other countries with the prospect of getting their foot in the door in the biggest market out there, the United States.
........ Wrong.
At this point in history, even without Communism in the air, most of the Nations in Asia and the Third World want actually to be capable of stand for themselves rather than depend on exporting of Commodities.
The US isn't like in OTL investing in order to improve the quality of life and the economic situation in Asia and America as part of their Anti communism strategies.
Moreover , you seem to be once again super-imposing the OTL economic and monetary reality, to what it's the reality of the US in the starting 60'S ITTL, something that to this height is NOWHERE close to OTL due to multiple factors.
No BILLIONS of dollars in Hard currency or lend lease owed by the British and French.
Not HUNDREDS of Factories that provided virtually 9/10 of everything that the Allied used in OTL, from food to War materials, and that post War enabled the American industry to produce at near nominal costs while making a killing in sells world wide, all while most of the Industry in Europe needed to be rebuilt from bombed scraps
And NO GI Bill that enabled a WHOLE Generation post War to go to the Universities, ensuring that the 50's and 60 would have a whole generation of professionals that injected further knowledge and inventive to the American Industry.
As such, if anything, the Americans are slowly getting more and more in second place, as the 3rd World nations are giving facilities to Germany and European Nations that have been copying the German style of "Diplomacy", Namely to ONLY open their doors to those Nations who, like Germany, are making solid investments in building up the industry and infrastructure in those countries that receive them, and guarantee that their people will get works decently remunerated, adequate education and investment in their surroundings.
Cuba was the biggest example of the starting clash at the end of the 50's , not between Communism and Capitalism, but between Langism/Social Democracy and Old Style Capitalism,
Simply at this point in the timeline, your affirmation simply lacks empirical support based on the events in the timeline itself.
Moreover you are falling in an utter fallacy, namely that you seem to forget that A China that hasn't fallen to Communism is STILL THE biggest market of the world out of sheer numbers, and THAT is the core motivation of Harriman deciding to support them.
Had he actually gotten a clue about the geopolitical forces involved in the background , he would grasp that to get the United States mixed up in Korea its the tactical and strategic equivalent of getting his wedding tackle straight into a wood chipper.
In the moment that the Americans support the Chinese, not only the Germans, but the Vietnamese, the Japanese AND possibly the British and Hindi AND the Russians will get involved.
This will be a Dark page for everyone, a comedy of errors in judgement and understanding of Asian behaviour and society by the Americans, and one that will haunt Harriman and America for a long time.....