The Korean War ended up benefitting South Korea in the sense that they didn’t up like North Korea. The free trade agreements have largely been responsible for large numbers of the world's population improving their living standard. There are other examples of intervention being good. Of course there are lots of examples of intervention being bad.
There is nothing special about Western intervention vs. intervention by other regional powers. Nations with power rarely use it for the well being of the world. But shouldn’t one strive to have governments do what you consider to be right?
>The Korean War ended up benefitting South Korea in the sense that they didn’t up like North Korea
This is an incorrect understanding of Korean history. US anti-communist policy played no small part in creating North Korea in the first place.
In the postwar period, US support for the right-wing dictator Syngman Rhee, who murdered tens of thousands of Korean citizens he suspected were his political opponents, empowered and drew popular support to Kim Il-Sung. Sung was further bolstered by the US giving favored status to Japan over Korea, forcing them, for example, to purchase goods and expertise from their brutal, former colonial rulers. With this state of affairs, Sung, a former anti-Japanese resistance fighter, was successful in persuading many that that the US-backed rule of Rhee was just an extension of the pre-War colonial rule, ultimately devolving into the never-ending civil war we have today.
This in no way benefitted the south, but instead has been a nearly 70 year long drag on their economy, as well as their development into a liberal democracy (which really didn’t happen until a popular revolt in the 80s because the continued US to provide financing and support to authoritarian rulers in the south).
I think it is undeniable that Sung would, with Chinese and Soviet help, would have revolted against anyone who was in power at the time. Regardless of US actions. (The Sino-Soviet split occurred later.) Without US backing Sung would have won and Korea would be much worse off now. At least as I see things.
There is nothing special about Western intervention vs. intervention by other regional powers. Nations with power rarely use it for the well being of the world. But shouldn’t one strive to have governments do what you consider to be right?