Incidentally, the "it's wrong to intervene" argument is NOT the argument Phlox uses for not giving the cure, it's that the disease is a genetic disorder, and so the "gods of evolution" have slated for the Valakians to go extinct.
So Phlox's rationale for his psychopathic actions is not "imperialism," it's pseudo-science.
And the differences between giving a cure for a disease and a military intervention are so numerous that I can't believe anyone would even try to compare the two.
Did Archer have to consider casualties of troops here? Or civilian deaths as collateral damage in battles? Or political balance-of-power calculations?
In other words, what was it costing him to give the cure? What was the dilemma?
There was none.
You distort Phlox' argument via not mentioning the Menk and then ask what the dilemma is? He presented it in a crystal clear fashion which one cannot say about your intellectually dishonest distortions.