Now we'll need to be fully diligent, which means more work, and also there'll be way more things to review.
AI does indeed threaten people's ability to identify whether they are reading work by a high status human and what the group consensus is - and that is a real problem for most people. But it has no bearing on how correct information was in the past vs will be in the future. Groups are smart but they get a lot of stuff wrong in strategic ways (it is almost a truism that no group ever identifies itself or its pursuit of its own interests as the problem).
Plenty of people care about the truth in order to get advantages over the ignorant. Beliefs aren't just about fitting in a group, they are about getting advantages and making your life better, if you know the truth you can make much better decisions than those who are ignorant.
Similarly plenty of people try to hide the truth in order to keep people ignorant so they can be exploited.
There are some fallacious hidden assumptions there. One is that "knowing the truth" equates to better life outcomes. I'd argue that history shows more often than not that what one knows to be true best align with prevailing consensus if comfort, prosperity and peace is one's goal, even if that consensus is flat out wrong. The list is long of lone geniuses who challenged the consensus and suffered. Galileo, Turing, Einstein, Mendel, van Gogh, Darwin, Lovelace, Boltzmann, Gödel, Faraday, Kant, Poe, Thoreau, Bohr, Tesla, Kepler, Copernicus, et. al. all suffered isolation and marginalization of some degree during their lifetimes, some unrecognized until after their death, many living in poverty, many actively tormented. I can't see how Turing, for instance, had a better life than the ignorant who persecuted him despite his excellent grasp of truth.
When dealing with almost everything you do day by day, you have to rely on the credibility of the source of the information you have. Otherwise how could you know that the can of tuna you're going to eat is actually tuna and not some venomous fish? How do you know that you should do what your doctor told you? Etc. etc.
But isn't your third sentence True?
The best we can hope for is prioritizing which things are worth checking. But even that gets harder because you go looking for sources and now those are increasingly likely to be LLM spam.
Unfortunately it's not clear how this could be adapted to the internet and international commerce without harming some of the open-ness aspects we'd like to keep.
They didn't say that and that's not a fair or warranted extrapolation.
They're talking about a heuristic that we all use, as a shorthand proxy that doesn't replace but can help steer the initial navigation in the selection of reliable sources, which can be complemented with fact checking (see the steelmanning I did there?). I don't think someone using that heuristic can be interpreted as tantamount to completely ignoring facts, which is a ridiculous extrapolation.
I also think is misrepresents the lay of the land, which is that in the universe of nonfiction writing, I don't think that there's a fire hose of facts and falsehoods indistinguishable in tone. I think there's in fact a reasonably high correlation between the discernible tone of impersonal professional and credible information, which, again (since this seems to be a difficult sticking point) doesn't mean that the tone substitutes for the facts which still need to be verified.
The idea that information and misinformation are tonally indistinguishable is, in my experience, only something believed by post-truth "do you own research" people who think there are equally valid facts in all directions.
There's not, for instance, a Science Daily of equally sciency sounding misinformation. There's not a second different IPCC that publishes a report with thousands of citations which are all wrong, etc. Misinformation is out there but it's not symmetrical, and understanding that it's not symmetrical is an important aspect of information literacy.
This is important because it goes to their point, which is that something has changed, in the advent of LLMS. That symmetry may be coming, and it's precisely the fact that it wasn't there before that is pivotal.
I suppose a related problem is that we can't know if the human who posted the article, actually agrees with it themselves.
(Or if they clicked "Generate" and don't actually care, or even have different opinions)
All of that is gone now. You have LLMs spitting their excrement directly onto the web without so much as a human giving it a once-over.
I don't criticise you for it, because that strategy is both rational and popular. But you never checked the accuracy of your information before so you have no way of telling if it has gotten more or less accurate with the advent of AI. You were testing for whether someone of high social intelligence wanted you to believe what they said rather than if what they said was true.