Let's face it, cable/satellite subscribers are generally older, less tech savvy and don't really care about new shows. They don't want to go in and out of different apps and just want to channel up and down or punch in a channel number. They just want to watch something and are fine with reruns, HGTV crap and movies on the Hallmark channel.
Set my mother in law up with apps that had all the content she likes and she doesn't use them, resorted to the sub channels on an OTA antenna because she "just wants to flip through the channels".
As the boomers die off, so will cable and satellite TV.