They didn't used to be flaws. They used to be cognitive shortcuts that helped people make decisions quickly with incomplete information. Then John B. Watson a

They didn't used to be flaws. They used to be cognitive shortcuts that helped people make decisions quickly with incomplete information. Then John B. Watson and the study of behaviorism came along in the early 20th century. Persuasion techniques were systematically identified and studied, and with the advent of mass media (TV, radio, internet), the cognitive shortcuts meant for neighbors and friends (tribe members) to persuade each other became flaws to abuse on a massive scale for profit and political power. I think it's well recognized by anyone who is interested in this stuff that persuasion techniques are an abuse of human psychology. Cialdini's books are perhaps the most famous. Everyone merely tells themselves, "other people are doing it, and their products or ideas are worse, so we have to."