That's an indictment of reddit comments more than AI. Remember that conditioned on the human-provided seed prompt, there is no statistical surprise (the definition of information) in the generated text. If all reddit comments are are riffs on the OP based on second-hand information, well then they may as well be bot-generated already.

At this stage, these AI's can only help. Imagine we are given this tool that can generate samples from the "uninformative but realistic looking text" distribution, we can then put it in a discriminator to filter out blabbering bots and humans together, or invert it to summarize the small kernel of information, and that would be a great thing. The better these models learn about typical human behavior the better off we are at identifying the truly exceptional. It's when AI starts to sense and incorporate novel information from the non-human environment that you really have to worry.