If you have ever been to Kitty Hawk, and looked at the little shack that the Wright brothers lived in, tar paper and all... then... you turn to face the wind which is almost ever present and you realize that no matter what the Wright brothers ate at Kitty Hawk it probably had sand in it.
I find it humorous that you made that observation, I have been a longtime fan of what they accomplished and have read everything I could find, and...I came to that same conclusion once upon a time!
Because I hate grit in ANY food...