R45
Early 1970's saw CBS and other major networks launch what has is now called the "rural purge". That is all the hooky, spooky, wacky, country/rural, western, military/war and so forth television shows were cancelled en masse. They were replaced by various programming networks claimed their research told them appealed to urban and suburban viewers.
Whites and others may have been fleeing NYC, LA, and other major urban areas for the safety (presumed) of suburbs, but they welcomed watching about goings on (crime in partiuclar) in cities from safety of their homes. Thus the endless wave of LE and private investigator shows from 1970's through 1980's. Even ancient Buddy Ebsen got in on it with his own series (Barnaby Jones), for which I for one am still wondering how that hot mess lasted several long years.
Rural purge got rid of shows like Bewitched (even if Elizabeth Montgomery hadn't called it quits, the show was going to be cancelled anyway), the Musters, The Beverly Hillbillies, Green Acres, etc... Their replacements ranged from variety shows such as Sonny and Cher, Flip Wilson, Carol Brunett, Tom Jones, etc... to aforementioned crime/LE dramas.
Behind all this was the battle for viewers between television and movies/films.
As WWII rolled along television largely upset the old movie/film order with more and more people staying home watching the tube. This coupled with forced (by court order) ending of old studio system left Hollywood/entertainment business up a creek. They responded by 1970's on wards by producing ever more *ahem* risky productions giving audiences what they couldn't get on television.
Television by early 1970's responded as noted above, they got rid of all those old westerns, shows about supernatural beings, cliche programming about "old family values" and introduced things totally opposite like All in The Family.
This battle between television and films got more intense when Washington got involved in response to objections by certain demographics regarding the "decline" of programming, especially "family" shows. Those around then will recall "prime time" viewing hours was introduced; a period where networks were supposed to show wholesome family orientated programming, keeping the smut off air until later when in theory children would be in bed.
Things got shook up even more by 1980's with introduction and rise of home video recording/playback machines, and cable television. Cable allowed people to see content they never would from network television. Closest thing to full nudity anyone got before then was on PBS; and even then it was the imported British or other European made content. My old man had a fit first time he caught me watching I Claudius. *LOL*