No. Both types have material to work with. They just emphasize one more than the other.Well okay here is my next question. Since I feel my internal world is much richer and deeper than the external world I see, wouldn't Ni have 100000000000 million times more material work with? Verse Ne which only has to work the externals?
And there is no reason to think that internal or external world is more useful for creativity (in terms of preference).
It seems to me that you're just forcing a personal bias through a very loose understanding of the function theory.