As a society we've been dedicating a lot of resources to time series prediction for many years.
What makes LLMs culturally significant is that they generate sequences that map to words that seem to humans like intelligent responses.
Arguably, it has always been obvious that a sufficiently capable time series predictor would effectively be a super-weapon.
Many technological advances that are currently in the realm of sci-fi could be classified similarly.
However so could many technologies that are now widespread and largely harmless to the status quo.
People worried that the internet would create massive social upheaval. But soon got algorithmic feeds which effectively filter out antisocial content. The masses got mobile phones with cameras, but after a few scandals about police brutality the only place we find significant content about police misconduct is CCP-afiliated TikTok.
I think people get squeamish about AI because there are not clear authority structures other than what one can buy with a lot of A100s. So when people express concern about negative consequences, they are in effect asking whether we need yet another way that people can convert money + public resources into power while not contributing anything to society in return.