IMO......South Korea is not worth the cost and America should remove all military presense from the penninsula.
If we were to announce our intention to vacate, some would cheer, but the majority of South Koreans would shudder at being left to the mercy of the voracious militant North.
Let Japan and China sort out the problem.
We have bigger fish to "fry" in the middle east!!
I am in total agreement with your assessment, although for a different reason. I'm of the opinion that all of our resources should be brought within our own borders immediately in order to cure the socialist and Godless cancer that's spreading, sure to sink the America we (once) knew, before it's too late.
Hate like heck to see S. Korea go under, but like you said, let China and Japan sort it out.