>Factual correctness is not very important, you don't have to trust it.If these chat bots are going to replace or compete with the traditional search interface, then correctness is absolutely key.
When a traditional search engine points you to some spammy site, you have far more context to decide for yourself how much credibility you ascribe to it. You may know the site from earlier visits. You can see whether it's completely ad infested and what the likely business model is. You can see what else is on the site. You can check who the publisher is, etc.
But when a chat bot delivers results in a conversational style, there is absolutely no indication as to whether a particular claim is fact or fiction. If the bot provides links to sources that's great, but then you're back to square one reading through 10 paragraphs of blog spam trying to filter out the one bit that may answer your question.
Also, the way in which these bots fail compared to traditional content farms and spammy blogs is very different. These sites tend to copy stuff from elsewhere. They may repeat falsehoods published by others. But they are unlikely to just make up numbers and present them as fact.