I don't quite agree with that, Anonymoose, and the reason being Bahamut himself isn't an elemental primal, and he existed far before these six elemental primals did. If Odin's original form was a real person made into a primal then perhaps that shows more of a trend of primals being based on historical beings, and those primals based on real people surviving longer than the primals based on the natural forces.

That said, I wholly believe that the modern primals do certainly appear to be the natural forces deified, and I would like to propose that Bismark may be another aspect of wind that is not the Vortex/tornado. I think the reason we are dealing with elemental primals in the first place is because it helps with the Ascians' machinations to weaken Hydaelyn. By dividing the elements into individual forces they can make the "All made One" into the "One made Many" and open the way for their singular unified deity to take his place as ruler.