You may be right. I read this on the late Sheldon Brown's website, and it stuck. References:

    https://www.sheldonbrown.com/tancrank.html
    Left-threaded pedals and cranks are reputedly an invention of the Wright brothers, bicycle builders from Dayton, Ohio. (They also built airplanes). 

    https://www.sheldonbrown.com/brandt/left.html
    The left-threaded left pedal was not the result of armchair theorizing, it was a solution to a real problem: people's left pedals kept unscrewing! We have read that the left threading was invented by the Wright brothers, but we are not sure of this.

So, I said it with more authority than was warranted. But it's good enough for normal dinner conversation references ;)