Could it be the incentives? With regard to books, paintings, theater, etc. you have an incentive to produce something that is meaningful or at least entertaining. Generally the artist is attempting to turn abstract thoughts or ideas into something real or quantifiable.

But TV and Social Media have their incentives twisted. It's just about ads. They don't really care what you are seeing as long as you are seeing as many ads as possible. The joke about TV was that a valid description of it was advertisements with a little bit of entertainment sprinkled in throughout.

I'm not saying that people haven't been able to use these platforms to build anything meaningful, but that the incentives and the purpose of these platforms are not to entertain, but to keep you glued to the feed for as long as possible to see as many ads as possible (which is why I think "rage bait" is so common).