As a counterpoint to this argument, the reason we have libel/slander laws is that people hear something and don't check if they're factual.
If I say, "danmaz74 eats babies," some people are going to believe it and not check that you don't eat babies. That's the problem with saying false things about people. Likewise, if ChatGPT says false things about people, some people will believe those false things - even if they don't publish anything or repeat them. Those false beliefs then have repercussions.
Section 230 doesn't eliminate libel. It just notes that the libel is being done by the person writing the information - ie. the user who posts it rather than the site that is merely hosting the information. It notes that the user is self-publishing the information.
In this case, ChatGPT is publishing this "information" itself. If we hold that ChatGPT isn't responsible for what they publish, we say that no one is liable for this defamation. That's not what Section 230 does. Section 230 just notes who the publisher is - the user who wrote the information. We are determining who is the person doing the action. We could require sites to check everything. We could require your ISP to inspect all packets to make sure they don't contain libel. We could require your electric company to make sure that devices connected to their network aren't being used to send/receive libelous things. We don't because that would be a bit absurd and because the actual fault lies with a human being. In the case of ChatGPT, it seems like we still need to be identifying a culprit.
Let's say that I start auto-generating news articles. I don't check them (I don't even look at them) before they are published on my site. This is the same mechanic as ChatGPT - it's just auto-generated stuff. Therefore, I'm not liable under your definition. It's up to the readers of my site to decide to check this auto-generated stuff.
I agree that ChatGPT can be a useful tool. At the same time, I'm not sure we want to create a system where people can absolve themselves of liability by auto-generating stuff. Even without intent, one can be guilty of libel. Maybe the answer is that ChatGPT should be able to defend itself by showing what sources caused that generation and that the generation was reasonable. For example, a newspaper is expected to carefully check multiple reasonable sources. If ChatGPT can cite multiple reasonable sources (and it has interpreted those sources correctly), then the blame can be those sources. If ChatGPT cannot, then the blame might be on ChatGPT.
As you note, ChatGPT can be useful - and the more useful it gets, the more people will accept its statements as true. I think simply saying "as long as you know what they are," feels like someone trying to say both things - they're incredibly useful and completely trash! It's like when a company tells shareholders "we have a stranglehold on the market" and then tells the government "we have so much competition we're struggling to survive." You can't have both. You can be a novelty tool that you and everyone else thinks of as a joke or you can have a serious tool where libel is a serious issue. The Onion can publish satire because it's a satire site. The NYTimes can't publish something that sounds like a serious NYTimes article and then claim, if sued, that it was actually a satire article and that 100% of readers just read it as serious when it was meant as satire.
If a significant part of our future starts coming from these language models, we will have to ensure a certain standard of care around what they say.