If the above is true then all cognitive bias, simplistic heuristics, fallacies, and dark arts are good since we have conducted our lives for 200,000 years according to these and we are alive and kicking.

No. This does not work on an individual level; nearly every human is dead, because of inability to invent medicine and cure aging. Nor does it seem to work on a species level; the wikipedia page for our genus names fifteen extinct species, some of which are believed to have been as or nearly as intelligent as we were.