Think of it this way:

Automatically generating a stupid sentence is hard. Stupidity is difficult to simulate. Not lack of coherence. Not pure noise. Not word salad. Not poorly trained neural networks. But stupidity. It's hard.

Well, you can pretty much come up with a stupid paragraph on any topic if you just write a small script that searches YouTube using the appropriate search pattern, and just grabs some random comment from the top link. Chances are pretty good it's a stupid statement.