I think you overstate the immorality of the embargo. You know well the military history and putting an embargo on airplane parts does not make the US responsible for civil aviation disasters. If a country cannot build a technology, and cannot get along well enough with the world to buy it, then they just won't have aircraft. They do not somehow have a human right to commercial air travel. Putting people on airplanes that aren't safe rather than grounding the aircraft and either developing the technology themselves or mending fences abroad is an arrogant and ghastly choice.
I think you overstate the immorality of the embargo. You know well the military history and putting an embargo on airplane parts does not make the US responsible for civil aviation disasters. If a country cannot build a technology, and cannot get along well enough with the world to buy it, then they just won't have aircraft. They do not somehow have a human right to commercial air travel. Putting people on airplanes that aren't safe rather than grounding the aircraft and either developing the technology themselves or mending fences abroad is an arrogant and ghastly choice.