Maybe with no one to stop time their world simply would have ended.

[ He sounds a little sarcastic but... sure, that's possible. He'll leave it on the table. ]

And maybe without us helping the natives evacuate there would have been more casualties.

[ Less sarcastic, though still not like he quite believes it. ]

But out presence may have accelerated that man's efforts. And our presence certainly drew resources away from whatever forces might have counteracted those efforts.

[ If nothing else the parade of dragons and fancy horses surely took attention away from more critical matters. Katsura finally reaches up to brush a stray strand of hair away from his face - and only just now seems to realize that it's only stuck there because of the blood. Gross.

He lets his hand fall to his side. He needs a shower, but he'll deal with it anyway. ]

I think it may have happened number of ways - except for how it actually happened.

[ Which is ultimately the issue, in his opinion. ]