While I unfortunately am expecting some people to do terrible things with LLM, I feel like much of this existential angst by DH and others has more to do with hubris and ego than anything else. That a computer can play chess better than any human doesn't lessen my personal enjoyment of playing chess.
At the same time I think you can make the case that ego drives a lot of technological and artistic progress, for a value-neutral definition of progress. We may see less 'progress' from humanity itself when computers get smarter, but given the rate at which humans like to make their own environment unlivable, maybe that's not a bad thing overall.