It did not require native Americans, lighting could do it just fine.

What was the thinking of these native Americans you speak of? Were they thinking "we should start wildfires because it will be better for the forest over a period of centuries"? Because...?

I agree that the practice of trying to stop these fires results in larger fires later. What I'd like is more information on why native Americans were able to realize and act on this. I'm willing to believe it, but not without some explanation.