Interesting theory but those of us on planet Earth are dealing with plenty of fires started by lightning.
In short: humans aren't required for fire to exist. Your argument is faulty.
Insulting natives for lighting fires shows complete disrespect and ignorance of the underlying environments, flora and fauna as well as their part in all of it. You aren't advanced and knowledgeable: you're just ignorant, smug, and delusional.
I agree that there seems to be a bit of bias (if not racism) in the OP's point, but there's no denying that the vast majority of fires are created by humans, whether indigenous, farmers, or hikers.