At that time, nobody believed a dead internet was technically feasible. Maybe this is hard to remember now.
The "danger" was in terms of spam / misinformation proliferation, not the same category of capabilities adjacent risks current discussed.
You can hold your own opinions on spam/misinformation as a problem, but to say there was no credibly anticipated outsized downside to a sudden jump in human-passing text generation feels pretty off to me.
It's dramatic for sure, but at the time it was genuinely alarming to think through the implications of a machine being able to generate plausibly human-authored text. I think many of the alarming implications have in fact come to pass, and the world is a more strange and dangerous place than it was before.
