Cooking over a wood fire: Bad Stuff?

It is not safe to cook foods over burning wood. For proof, one only needs to look at early humans. They learned to cook their food over wood, and none of them even survived the released poisons long enough to have offspring. Hence, early humans died off.

It should be pointed out that they’re all dead!

Perhaps the ones that survived cooked over dried dung…

But the earliest humans routinely outlived trees and only started burning them out of spite for being so weakly.