All the potential function progressions are equally classifiable. You have made no case, at all, to show that the one you've chosen (arbitrarily, because you saw it written down somewhere) is any more classifiable than the others. All you have done is stated it is, repeatedly.
Your drawing sucks, too.

What you dont get is that duality is at the heart of socionics, and the functions. Any progression you make will necessarily have an opposite and equally valid progression.