The U.S. FCC's fairness doctrine "required licensed radio and television broadcasters to present fair and balanced coverage of controversial issues of interest to their communities, including by devoting equal airtime to opposing points of view." It was mostly repealed in 1987 under Reagan. A few provisions lasted a little longer.

I think some radio shows etc have greater ability to be polarizing with this out of the way, and our respective bubbles freer from outside disturbance.

https://www.britannica.com/topic/Fairness-Doctrine