There’s also the matter that the Manhattan Project was under one authority. As an ancestral comment mentioned, there’s multiple automakers involved. It would be

There’s also the matter that the Manhattan Project was under one authority. As an ancestral comment mentioned, there’s multiple automakers involved. It would be trying to build a bomb and dealing with not only the gun type design vs. the implosion design but a bevy of others, whose proponents all have equal influence over Oppenheimer to stymie the effort.