I’m sorry. We must have completely different recollections about the 1980’s and 1990’s.
I don’t want to make assumptions about your age, but as someone who grew up in the 80s and graduated high school in early 90s, I have to say that your assertion about cable is not at all in line with what I experienced or saw. Not at all.
MTV changed television in the 80s and 90s. I’d say that during that time, if you went to a teenager’s house at any given time of the day, there was a better than 70% chance that MYV was playing.
HBO, Showtime, Cinemax, TMC. These changed television because people like me watched Side Out and The Burbs three times a week. It really changed how we viewed movies.
ESPN changed the game for sports. Guys like Deion Sanders and Michael Jordan owe a lot of their popularity to ESPN. Beginning early 90s, Sportscenter became must see tv for any sports fan.
Heck, even wrestling became the global fixture that it is because of cable. Before WWF went on USA network and WCW went on TBS, wrestling was solely territorial. Cable allowed it to be a national programming staple.
South Park didn’t start airing until late 90s. Cable tv was a fixture waaayyyy before that. And as much as I loved Thursday Night Fights on USA, or HBO boxing, those had very little to do with cable tv’s popularity.