Lol. No, they didn’t fall out the air. They built on what was there, just like every other civilization did in turns.
For example, it stands to question why the Chinese didn’t take good advantage of their own gunpowder to the level the Whites did. I think the answer to that is adventure. They saw beyond their own shores.
Ok, so everything can be simplified down to some vague notion of "adventure," stripped of any cultural component. Is this your final argument?