Have you used chatGPT? At least bing's version? It adds links right there too.
So when you prod it, you're not doing so "for the truth" (you also don't prod "for the truth" in general...), you're getting it to generate more information and potentially relevant sources.
I just did it. I asked for an argument about x, then prompted for counter opinions about the same subject - both times different links were added.
In the end, it's up to you to validate sources provided.
You have zero context in ChatGPT though. Like even if you don’t know or have an opinion about a specific website you’ll eventually form one if you keep accessing it.
This is a huge downside of GPT. Until it starts citing it’s exact sources it can’t be a reliable tool in most cases.
So this is a good lesson in how important defaults are, most are not going to keep looking.