People didn't really search for content when there were a handful or just one TV station or radio station. That's exactly the time when the hypothesis of strong

People didn't really search for content when there were a handful or just one TV station or radio station. That's exactly the time when the hypothesis of strong media effects was very popular (also because of the then current fascist or communist regimes and their propaganda) yet researchers were again and again unable to confirm it. I'm not saying that it's in principle not possible to influence people's opinions but I think it's very hard and we understand next to nothing about how one would go about influencing opinions in a systematic fashion.