only remember things that reinforce the way you think or believe

If you want to maintain the belief that Aboriginals are magical managers of the natural environment, you have to forget all of the species that disappeared when they arrived.

After 60,000 years of man-made fires, the only species left are those which were resistant, or could adapt. To consider those remaining species and conclude that native bushland benefits from regular fire is the textbook definition of a cognitive bias, because you have to disregard all the species which no longer exist.