Yes, it's all based on a bunch of statistics. I haven't read Jung, but I expect that he is looking for A versus B, rather than A versus C, because of how
he interpreted the results of
his studies.
Human behavior is not really an exact science. All those models are just that: models, approximations of a problem that is too complex and has too many variables for us humble humans to solve. Maybe some day a very smart mind (human or otherwise) will be able to discern the exact algorithm that defines all human behavior and help us explain humanity's every single quirk... until that day, crude tools like Jung's models will have to suffice.
