We can see the Sun going around the Earth, and the facts contradict our perception. Same with mbti.
You'd have to have presented a much firmer grasp of psychological type for me to give your view on this any credit.
I've studied the system for 8 years, to the point that I've been able to see its manifestation directly, and make strong speculations beyond what the current knowledge is.
If you don't believe in the idea of type (Dario Nardi speaks of "strange attractors") then just wait until it becomes scientifically credited.
Then you'll need a much stronger argument in order to discredit it.
There are strong arguments available, not so much regarding the non-existence of type, but regarding its limitations.
I've provided a starting point: all 16 types exist within us, each in a multitude of possible formations, and we can activate different modes through the will.
Yet I have not in that invalidated that we have a type - only modified what having a type means.
There is much that type does not cover - before, around, and after it. These can be incorporated into the model.
If psychological type is at the level of Newton's laws, then it will come to the point of General Relativity, not to mention Quantum Mechanics.
How exciting it is to be a part of its development!
Yet there is more to life, and I have been submerged in untangling this web for long enough.
It is time for me to discover what else life has to offer.
Adieu.