Perhaps it is an "anti-brain hacking" mechanism essentially where not being swayable at the wrong moment kept them collectively from getting killed in band vs b

Perhaps it is an "anti-brain hacking" mechanism essentially where not being swayable at the wrong moment kept them collectively from getting killed in band vs band conflicts? Which is sadly is more "prevent it from getting hacked again thing". Also past evolutionary importance of course doesn't tell us much about the how relevant it is in the here and now. Smallpox resistance for example doesn't mean anything after we eradicated the illness after centuries of effort.