Why TV got changed later I don't know. My guess...the government created the FCC and studios worried about fines. (I have not looked that up)
This post was edited by my2cents at April 21, 2021 5:11 PM MDT
Mary Whitehouse had a lot to do with it she was the founder of the National Viewers' and Listeners' Association, whose goal was to clean up television which she perceived as corrupting the nation's morals. Deep Purple has a song about her called Mary Long. Cheers!